feat(servers): flatten mcp.json settings to top-level fields (#1358) (#1359)

* feat(servers): flatten mcp.json settings to top-level fields (#1358)

Eliminate the nested `settings` block introduced in #1352 so each
server entry's Inspector-extension fields live as direct keys alongside
`type` / `url`, matching the `.mcp.json` shape Claude Code / Cursor /
Cline write:

  - `headers` becomes a `Record<string, string>` on disk (was nested
    `settings.headers` as a pair-array)
  - `oauth` becomes a nested `{ clientId?, clientSecret?, scopes? }`
    object (was flat `settings.oauthClientId` / `oauthClientSecret` /
    `oauthScopes`)
  - `metadata`, `connectionTimeout`, `requestTimeout` move to the
    entry's top level as-is (Inspector-only fields)

The in-memory + wire shape is unchanged from #1352: `InspectorServerSettings`
keeps pair-array `headers` and flat `oauth*` fields because the form
needs them in that shape to drive controlled-component editing. The
bidirectional conversion lives in `serverList.ts`
(`storedFieldsToInspectorSettings` / `inspectorSettingsToStoredFields`)
and is invoked by `mcpConfigToServerEntries` / `serverEntriesToMcpConfig`
and by the server route's `buildStoredEntry`. The `PUT /api/servers/:id`
wire envelope keeps the preserve/clear/apply semantics from #1353 — the
backend splats validated `settings.*` onto top-level disk keys when
assembling the next on-disk shape.

Hard-cutover migration per the issue's decision 4: files written by the
one pre-#1358 v2/main build have a nested `settings` block; we drop the
node on read with a one-line warn including the server id. The persisted
headers / metadata / timeouts / OAuth credentials are intentionally lost
on first read — users re-enter them via the form (or hand-edit the file
into the flat shape). v2 has not shipped a stable release with the
nested shape, so the blast radius is dogfooders only.

The smuggle-guard in `buildStoredEntry` widens from just `settings` to
all six Inspector-extension keys (`settings`, `headers`, `metadata`,
`connectionTimeout`, `requestTimeout`, `oauth`), so a caller can't
bypass `validateSettings` by nesting any of them inside `config`.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* fix(servers): address PR review on flatten (#1359)

- Single-source the Inspector-extension key list with `satisfies`
  (finding 1). `INSPECTOR_FIELD_KEY_MAP satisfies Record<keyof
  StoredInspectorFields, true>` in serverList.ts means a new field on
  the type forces a compile error here. The set is exported and
  re-used by the server route's smuggle guard, so adding `proxy` or
  similar in the future updates all three sites in lockstep. The PUT
  preserve path now uses a new `stripInspectorFields` helper that
  derives from the same source instead of hand-destructuring.
- Add read-path shape validation in `normalizeMcpServers` (finding 2):
  `headers: "oops"` / `metadata: 42` / `oauth: []` / non-numeric
  timeouts are dropped individually with a warn, so a hand-edited
  malformed file can't put garbage rows into the form. Mirrors the
  write-side `validateSettings` symmetry. New integration test covers
  each malformed shape with a partial fixture so a single bad key
  doesn't take out the whole entry.
- Align new warns to the `fileLogger || console.warn` fallback pattern
  (finding 3) via a small `logWarn` helper, so the legacy-drop and
  smuggle warns are visible in `npm run dev` where the logger is
  often unconfigured.
- Spec doc tweak: the CLI/TUI out-of-scope note's "writes to
  `settings.headers`" reference now reads "writes to the entry's
  top-level `headers` field on disk (post-#1358 flat shape)" (finding
  4). Avoids confusion for future readers.
- Nits: replace `current.mcpServers[originalId]!` with explicit
  narrowing; add a comment on the OAuth truthiness drop in
  `storedFieldsToInspectorSettings` mirroring the write-side comment.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* fix(servers): address pass-2 review on flatten (#1359)

- Tighten `isNonNegNumber` with `Number.isFinite` so `Infinity` and
  `NaN` are rejected at the read boundary, matching the write-side
  intent (finding D). Hand-edited `connectionTimeout: Infinity` would
  have passed the prior check and propagated to the form.
- Add a one-line comment in `normalizeMcpServers` noting that the
  per-entry object is mutated in place via the `delete` calls — safe
  for today's callers (freshly parsed JSON, no other reference held)
  but worth flagging for the next reader (finding A).

Skipping findings B (move type guards to module scope — single call
site) and C (`isOauthObject` lenient on extra keys — reviewer
confirmed this is the intended forward-compat behavior, matching
`normalizeServerType`'s unknown-key passthrough).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

* docs(servers): fix mutation-comment caller branch label (#1359)

The previous comment named the GET handler's "seed branch" as a caller
of normalizeMcpServers, but that branch returns DEFAULT_SEED_CONFIG
directly without normalizing. The actual second caller is the
file-present branch (after parseStore). Correcting the label so a
future reader looking for the seed branch caller doesn't waste time.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
This commit is contained in:
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commit a9df501856
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3 changed files with 808 additions and 242 deletions

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@ -147,20 +147,23 @@ describe("serverEntriesToMcpConfig", () => {
expect(round).toEqual(original);
});
it("round-trips a populated settings node through both converters", () => {
it("round-trips a populated set of Inspector-extension fields (post-#1358 flat shape)", () => {
// Disk shape: top-level `headers` (Record), `metadata` (pair-array),
// numeric timeouts, nested `oauth`. Round-trip must preserve the on-
// disk shape byte-equivalent so a hand-edited file is stable.
const original: MCPConfig = {
mcpServers: {
gamma: {
type: "streamable-http",
url: "https://x.test/mcp",
settings: {
headers: [{ key: "Authorization", value: "Bearer xyz" }],
metadata: [{ key: "tenant", value: "acme" }],
connectionTimeout: 30000,
requestTimeout: 60000,
oauthClientId: "client-abc",
oauthClientSecret: "secret-def",
oauthScopes: "read:tools",
headers: { Authorization: "Bearer xyz" },
metadata: [{ key: "tenant", value: "acme" }],
connectionTimeout: 30000,
requestTimeout: 60000,
oauth: {
clientId: "client-abc",
clientSecret: "secret-def",
scopes: "read:tools",
},
},
},
@ -169,36 +172,58 @@ describe("serverEntriesToMcpConfig", () => {
expect(round).toEqual(original);
});
it("lifts the settings node from the stored entry onto ServerEntry.settings", () => {
it("lifts top-level Inspector-extension fields onto ServerEntry.settings (form shape)", () => {
const cfg: MCPConfig = {
mcpServers: {
alpha: {
type: "streamable-http",
url: "https://x.test/mcp",
settings: {
headers: [{ key: "X-Tenant", value: "acme" }],
metadata: [],
connectionTimeout: 0,
requestTimeout: 0,
},
headers: { "X-Tenant": "acme" },
oauth: { clientId: "the-client" },
},
},
};
const [entry] = mcpConfigToServerEntries(cfg);
expect(entry?.settings).toEqual({
// Object headers on disk → pair-array headers in memory
headers: [{ key: "X-Tenant", value: "acme" }],
metadata: [],
connectionTimeout: 0,
requestTimeout: 0,
// Nested oauth on disk → flat oauthClientId in memory
oauthClientId: "the-client",
});
// `settings` should not leak back into config — the SDK transport must
// see a clean MCPServerConfig.
expect(
(entry?.config as unknown as Record<string, unknown>).settings,
).toBeUndefined();
// None of the Inspector-extension keys leak back into config —
// the SDK transport must see a clean MCPServerConfig.
const configKeys = Object.keys(
entry?.config as unknown as Record<string, unknown>,
);
expect(configKeys).not.toContain("headers");
expect(configKeys).not.toContain("metadata");
expect(configKeys).not.toContain("oauth");
expect(configKeys).not.toContain("connectionTimeout");
expect(configKeys).not.toContain("requestTimeout");
});
it("omits the settings key on disk when ServerEntry.settings is undefined", () => {
it("lifts the headers field for a streamable-http entry written by Claude Code", () => {
// A pasted-in `.mcp.json` example from the Claude Code docs — top-level
// headers, no nested settings node.
const cfg: MCPConfig = {
mcpServers: {
"api-server": {
type: "streamable-http",
url: "https://api.example.com/mcp",
headers: { Authorization: "Bearer the-token" },
},
},
};
const [entry] = mcpConfigToServerEntries(cfg);
expect(entry?.settings?.headers).toEqual([
{ key: "Authorization", value: "Bearer the-token" },
]);
});
it("omits all Inspector-extension keys on disk when ServerEntry.settings is undefined", () => {
const entries: ServerEntry[] = [
{
id: "alpha",
@ -208,7 +233,67 @@ describe("serverEntriesToMcpConfig", () => {
},
];
const cfg = serverEntriesToMcpConfig(entries);
expect(cfg.mcpServers.alpha).not.toHaveProperty("settings");
const stored = cfg.mcpServers.alpha;
expect(stored).not.toHaveProperty("settings");
expect(stored).not.toHaveProperty("headers");
expect(stored).not.toHaveProperty("metadata");
expect(stored).not.toHaveProperty("oauth");
expect(stored).not.toHaveProperty("connectionTimeout");
expect(stored).not.toHaveProperty("requestTimeout");
});
it("drops empty-key header rows when serializing to disk", () => {
// The form leaves a blank row when the user clicks 'Add header' but
// hasn't typed yet. Those should not reach disk — the round-trip
// would otherwise produce `{ "": "..." }` which neither we nor the
// ecosystem can sensibly send as an HTTP header.
const entries: ServerEntry[] = [
{
id: "alpha",
name: "alpha",
config: { type: "streamable-http", url: "https://x.test" },
settings: {
headers: [
{ key: "X-Tenant", value: "acme" },
{ key: "", value: "stub" },
{ key: " ", value: "whitespace" },
],
metadata: [],
connectionTimeout: 0,
requestTimeout: 0,
},
connection: { status: "disconnected" },
},
];
const stored = serverEntriesToMcpConfig(entries).mcpServers.alpha;
expect(stored?.headers).toEqual({ "X-Tenant": "acme" });
});
it("omits zero-valued timeouts and empty oauth fields on serialize", () => {
// The form keeps numeric defaults at 0 and empty-string OAuth values.
// Round-tripping them onto disk would leave noisy `connectionTimeout: 0`
// / `oauth: {}` keys; suppress them so the diff stays minimal for
// entries the user never customized.
const entries: ServerEntry[] = [
{
id: "alpha",
name: "alpha",
config: { type: "streamable-http", url: "https://x.test" },
settings: {
headers: [],
metadata: [],
connectionTimeout: 0,
requestTimeout: 0,
},
connection: { status: "disconnected" },
},
];
const stored = serverEntriesToMcpConfig(entries).mcpServers.alpha;
expect(stored).not.toHaveProperty("connectionTimeout");
expect(stored).not.toHaveProperty("requestTimeout");
expect(stored).not.toHaveProperty("oauth");
expect(stored).not.toHaveProperty("headers");
expect(stored).not.toHaveProperty("metadata");
});
it("preserves insertion order on serialize", () => {

View file

@ -397,14 +397,18 @@ describe("useServers", () => {
requestTimeout: 30000,
});
});
const stored = readConfig(h.configPath).mcpServers.alpha as {
type?: string;
url?: string;
settings?: unknown;
};
const stored = readConfig(h.configPath).mcpServers
.alpha as unknown as Record<string, unknown>;
// Post-#1358: settings round-trip onto top-level keys on disk, no
// nested `settings` wrapper. Each non-zero/non-empty field surfaces
// as a sibling of `type` / `url`.
expect(stored.type).toBe("streamable-http");
expect(stored.url).toBe("https://x.test/mcp");
expect(stored.settings).toBeDefined();
expect(stored).not.toHaveProperty("settings");
expect(stored.headers).toEqual({ "X-Tenant": "acme" });
expect(stored.metadata).toEqual([{ key: "trace", value: "abc" }]);
expect(stored.connectionTimeout).toBe(5000);
expect(stored.requestTimeout).toBe(30000);
});
it("updateServerSettings throws when the target id does not exist (server-side 404)", async () => {
@ -433,12 +437,9 @@ describe("useServers", () => {
alpha: {
type: "streamable-http",
url: "https://x.test/mcp",
settings: {
headers: [{ key: "X-Keep", value: "yes" }],
metadata: [],
connectionTimeout: 0,
requestTimeout: 0,
},
// Post-#1358 flat shape on disk; the hook lifts `headers` into
// the pair-array `settings.headers` it exposes.
headers: { "X-Keep": "yes" },
},
},
}),

View file

@ -370,13 +370,17 @@ describe("/api/servers routes", () => {
});
describe("settings round-trip", () => {
it("persists a settings node on POST", async () => {
it("persists Inspector-extension fields at the top level on POST (post-#1358 flat shape)", async () => {
const res = await fetch(`${h.baseUrl}/api/servers`, {
method: "POST",
headers: { "Content-Type": "application/json" },
body: JSON.stringify({
id: "gamma",
config: { type: "streamable-http", url: "https://x.test/mcp" },
// Wire envelope unchanged from #1353: pair-array headers, flat
// oauth* fields. Backend splats these into the flat disk shape:
// object headers, nested oauth, plus the inspector-only fields
// at the top level.
settings: {
headers: [{ key: "Authorization", value: "Bearer xyz" }],
metadata: [{ key: "tenant", value: "acme" }],
@ -388,20 +392,21 @@ describe("/api/servers routes", () => {
}),
});
expect(res.status).toBe(200);
const stored = readConfig(h.configPath).mcpServers.gamma as {
settings?: unknown;
};
expect(stored.settings).toEqual({
headers: [{ key: "Authorization", value: "Bearer xyz" }],
metadata: [{ key: "tenant", value: "acme" }],
connectionTimeout: 30000,
requestTimeout: 60000,
oauthClientId: "client-abc",
oauthScopes: "read:tools",
const stored = readConfig(h.configPath).mcpServers
.gamma as unknown as Record<string, unknown>;
// Disk shape: flat, no `settings` wrapper, object headers, nested oauth.
expect(stored).not.toHaveProperty("settings");
expect(stored.headers).toEqual({ Authorization: "Bearer xyz" });
expect(stored.metadata).toEqual([{ key: "tenant", value: "acme" }]);
expect(stored.connectionTimeout).toBe(30000);
expect(stored.requestTimeout).toBe(60000);
expect(stored.oauth).toEqual({
clientId: "client-abc",
scopes: "read:tools",
});
});
it("updates a settings node on PUT", async () => {
it("updates Inspector-extension fields at the top level on PUT", async () => {
writeFileSync(
h.configPath,
JSON.stringify({
@ -424,15 +429,14 @@ describe("/api/servers routes", () => {
}),
});
expect(res.status).toBe(200);
const stored = readConfig(h.configPath).mcpServers.delta as {
settings?: unknown;
};
expect(stored.settings).toEqual({
headers: [{ key: "X-Tenant", value: "acme" }],
metadata: [],
connectionTimeout: 0,
requestTimeout: 45000,
});
const stored = readConfig(h.configPath).mcpServers
.delta as unknown as Record<string, unknown>;
expect(stored).not.toHaveProperty("settings");
expect(stored.headers).toEqual({ "X-Tenant": "acme" });
expect(stored.requestTimeout).toBe(45000);
// Zero/empty values are suppressed on disk to keep the diff minimal.
expect(stored).not.toHaveProperty("metadata");
expect(stored).not.toHaveProperty("connectionTimeout");
});
it("rejects a non-object settings field", async () => {
@ -448,7 +452,7 @@ describe("/api/servers routes", () => {
expect(res.status).toBe(400);
});
it("preserves the settings node when PUT omits it (no clobber on config-only save)", async () => {
it("preserves Inspector-extension fields when PUT omits settings (no clobber on config-only save)", async () => {
writeFileSync(
h.configPath,
JSON.stringify({
@ -456,17 +460,13 @@ describe("/api/servers routes", () => {
epsilon: {
type: "streamable-http",
url: "https://x.test/mcp",
settings: {
headers: [{ key: "X-Keep", value: "yes" }],
metadata: [],
connectionTimeout: 0,
requestTimeout: 0,
},
// Post-#1358 flat shape on disk.
headers: { "X-Keep": "yes" },
},
},
}),
);
// PUT without a settings field: the existing settings node must
// PUT without a settings field: the existing top-level headers must
// survive. A caller updating only the transport config (e.g. the
// server config modal) must not silently wipe persisted headers.
const res = await fetch(`${h.baseUrl}/api/servers/epsilon`, {
@ -477,16 +477,14 @@ describe("/api/servers routes", () => {
}),
});
expect(res.status).toBe(200);
const stored = readConfig(h.configPath).mcpServers.epsilon as {
settings?: { headers: { key: string; value: string }[] };
};
expect(stored.settings).toBeDefined();
expect(stored.settings?.headers).toEqual([
{ key: "X-Keep", value: "yes" },
]);
const stored = readConfig(h.configPath).mcpServers
.epsilon as unknown as Record<string, unknown>;
expect(stored.headers).toEqual({ "X-Keep": "yes" });
// URL update must have applied.
expect(stored.url).toBe("https://x.test/other");
});
it("clears the settings node when PUT sends settings: null (explicit intent)", async () => {
it("clears Inspector-extension fields when PUT sends settings: null (explicit intent)", async () => {
writeFileSync(
h.configPath,
JSON.stringify({
@ -494,12 +492,9 @@ describe("/api/servers routes", () => {
zeta: {
type: "streamable-http",
url: "https://x.test/mcp",
settings: {
headers: [{ key: "X-Tenant", value: "acme" }],
metadata: [],
connectionTimeout: 0,
requestTimeout: 0,
},
headers: { "X-Tenant": "acme" },
metadata: [{ key: "trace", value: "abc" }],
connectionTimeout: 5000,
},
},
}),
@ -513,10 +508,14 @@ describe("/api/servers routes", () => {
}),
});
expect(res.status).toBe(200);
const stored = readConfig(h.configPath).mcpServers.zeta as {
settings?: unknown;
};
expect(stored.settings).toBeUndefined();
const stored = readConfig(h.configPath).mcpServers
.zeta as unknown as Record<string, unknown>;
// All Inspector-extension fields gone.
expect(stored).not.toHaveProperty("headers");
expect(stored).not.toHaveProperty("metadata");
expect(stored).not.toHaveProperty("connectionTimeout");
expect(stored).not.toHaveProperty("requestTimeout");
expect(stored).not.toHaveProperty("oauth");
});
it("rejects a malformed settings shape with 400", async () => {
@ -574,16 +573,11 @@ describe("/api/servers routes", () => {
}),
});
expect(res.status).toBe(200);
const stored = readConfig(h.configPath).mcpServers.theta as {
type?: string;
url?: string;
settings?: { headers: { key: string; value: string }[] };
};
const stored = readConfig(h.configPath).mcpServers
.theta as unknown as Record<string, unknown>;
expect(stored.type).toBe("streamable-http");
expect(stored.url).toBe("https://x.test/mcp");
expect(stored.settings?.headers).toEqual([
{ key: "X-Tenant", value: "acme" },
]);
expect(stored.headers).toEqual({ "X-Tenant": "acme" });
});
it("rejects a non-object config on PUT with 400", async () => {
@ -605,7 +599,7 @@ describe("/api/servers routes", () => {
expect(res.status).toBe(400);
});
it("validateSettings coerces empty-string OAuth fields to absent (cleared inputs don't read as 'configured')", async () => {
it("validateSettings coerces empty-string OAuth fields to absent (cleared inputs don't produce an oauth node on disk)", async () => {
const res = await fetch(`${h.baseUrl}/api/servers`, {
method: "POST",
headers: { "Content-Type": "application/json" },
@ -624,13 +618,11 @@ describe("/api/servers routes", () => {
}),
});
expect(res.status).toBe(200);
const stored = readConfig(h.configPath).mcpServers["empty-oauth"] as {
settings?: Record<string, unknown>;
};
expect(stored.settings).toBeDefined();
expect(stored.settings).not.toHaveProperty("oauthClientId");
expect(stored.settings).not.toHaveProperty("oauthClientSecret");
expect(stored.settings).not.toHaveProperty("oauthScopes");
const stored = readConfig(h.configPath).mcpServers[
"empty-oauth"
] as unknown as Record<string, unknown>;
// No `oauth` node on disk — every field was empty.
expect(stored).not.toHaveProperty("oauth");
});
it("validateSettings drops unknown keys (explicit pick-and-build, not spread)", async () => {
@ -651,24 +643,22 @@ describe("/api/servers routes", () => {
}),
});
expect(res.status).toBe(200);
const stored = readConfig(h.configPath).mcpServers["unknown-keys"] as {
settings?: Record<string, unknown>;
};
expect(stored.settings).toBeDefined();
expect(stored.settings).not.toHaveProperty("stowaway");
expect(stored.settings).toEqual({
headers: [{ key: "X-A", value: "1" }],
metadata: [],
connectionTimeout: 0,
requestTimeout: 0,
});
const stored = readConfig(h.configPath).mcpServers[
"unknown-keys"
] as unknown as Record<string, unknown>;
expect(stored).not.toHaveProperty("stowaway");
expect(stored).not.toHaveProperty("settings");
// Only the non-empty/non-zero settings field round-tripped to disk.
expect(stored.headers).toEqual({ "X-A": "1" });
});
it("strips smuggled config.settings on POST (validateSettings is the only write path)", async () => {
it("strips smuggled Inspector-extension keys from config on POST (envelope is the only write path)", async () => {
// `normalizeServerType` spreads unknown keys verbatim. Without the
// strip in buildStoredEntry, a body that nests `settings` inside
// `config` would land it on the stored entry without ever passing
// through `validateSettings`. Pin the strip.
// strip in buildStoredEntry, a body that nests Inspector-extension
// keys inside `config` would land them on the stored entry without
// ever passing through `validateSettings`. Pin the strip for both
// the legacy `settings` key and the new flat keys (`headers`,
// `metadata`, `connectionTimeout`, `requestTimeout`, `oauth`).
const res = await fetch(`${h.baseUrl}/api/servers`, {
method: "POST",
headers: { "Content-Type": "application/json" },
@ -678,17 +668,21 @@ describe("/api/servers routes", () => {
type: "stdio",
command: "node",
settings: { bogus: true },
headers: { Smuggled: "yes" },
oauth: { clientId: "smuggled" },
},
}),
});
expect(res.status).toBe(200);
const stored = readConfig(h.configPath).mcpServers["smuggle-post"] as {
settings?: unknown;
};
expect(stored.settings).toBeUndefined();
const stored = readConfig(h.configPath).mcpServers[
"smuggle-post"
] as unknown as Record<string, unknown>;
expect(stored).not.toHaveProperty("settings");
expect(stored).not.toHaveProperty("headers");
expect(stored).not.toHaveProperty("oauth");
});
it("strips smuggled config.settings on PUT even when settings:null clears the real node", async () => {
it("strips smuggled Inspector-extension keys from config on PUT even when settings:null clears the real fields", async () => {
writeFileSync(
h.configPath,
JSON.stringify({
@ -696,18 +690,14 @@ describe("/api/servers routes", () => {
smuggle: {
type: "stdio",
command: "node",
settings: {
headers: [{ key: "X-Real", value: "yes" }],
metadata: [],
connectionTimeout: 0,
requestTimeout: 0,
},
headers: { "X-Real": "yes" },
},
},
}),
);
// settings: null clears the real settings node; the bogus key nested
// under config must not re-attach via the spread inside normalizeServerType.
// settings: null clears the real Inspector-extension fields; the bogus
// keys nested under config must not re-attach via the spread inside
// normalizeServerType.
const res = await fetch(`${h.baseUrl}/api/servers/smuggle`, {
method: "PUT",
headers: { "Content-Type": "application/json" },
@ -716,15 +706,18 @@ describe("/api/servers routes", () => {
type: "stdio",
command: "node",
settings: { bogus: true },
headers: { Smuggled: "yes" },
connectionTimeout: 9999,
},
settings: null,
}),
});
expect(res.status).toBe(200);
const stored = readConfig(h.configPath).mcpServers.smuggle as {
settings?: unknown;
};
expect(stored.settings).toBeUndefined();
const stored = readConfig(h.configPath).mcpServers
.smuggle as unknown as Record<string, unknown>;
expect(stored).not.toHaveProperty("settings");
expect(stored).not.toHaveProperty("headers");
expect(stored).not.toHaveProperty("connectionTimeout");
});
it("rejects a settings array (not an object) with 400", async () => {
@ -742,42 +735,51 @@ describe("/api/servers routes", () => {
expect(body.error).toMatch(/object/);
});
it("strips a malformed settings node on read (lenient-on-read; preserve-on-PUT cannot propagate it)", async () => {
// Hand-edited mcp.json with a malformed `settings.headers` (string
// instead of array). The write-path validator would reject it, but a
// user could write it directly. GET should surface the entry with
// settings dropped, and a subsequent config-only PUT should not
// re-attach the broken node via the preserve branch.
it("drops a legacy nested `settings` node on read (hard cutover per #1358 decision 4)", async () => {
// A user upgrading from the one-#1352 v2/main build has a file with a
// nested `settings` block. Per the hard-cutover decision the persisted
// headers / metadata / timeouts / OAuth credentials are intentionally
// lost on first read — users re-enter them through the form or hand-
// edit the file into the flat shape. GET surfaces the entry with
// settings dropped, and a subsequent config-only PUT does not
// re-attach the legacy node via the preserve branch.
writeFileSync(
h.configPath,
JSON.stringify({
mcpServers: {
broken: {
legacy: {
type: "streamable-http",
url: "https://x.test/mcp",
settings: {
headers: "oops",
headers: [{ key: "X-Tenant", value: "acme" }],
metadata: [],
connectionTimeout: 0,
connectionTimeout: 30000,
requestTimeout: 0,
oauthClientId: "client-abc",
},
},
},
}),
);
// GET surfaces the entry without the malformed settings.
// GET surfaces the entry with the legacy settings dropped — no flat
// fields lifted in either (this is hard cutover, not migration).
const getRes = await fetch(`${h.baseUrl}/api/servers`);
expect(getRes.status).toBe(200);
const getBody = (await getRes.json()) as {
mcpServers: Record<string, { settings?: unknown }>;
mcpServers: Record<string, Record<string, unknown>>;
};
expect(getBody.mcpServers.broken).toBeDefined();
expect(getBody.mcpServers.broken!.settings).toBeUndefined();
const fetched = getBody.mcpServers.legacy!;
expect(fetched).toBeDefined();
expect(fetched).not.toHaveProperty("settings");
expect(fetched).not.toHaveProperty("headers");
expect(fetched).not.toHaveProperty("metadata");
expect(fetched).not.toHaveProperty("connectionTimeout");
expect(fetched).not.toHaveProperty("oauth");
// PUT without settings preserves the (now-stripped) absence, not the
// original malformed node.
const putRes = await fetch(`${h.baseUrl}/api/servers/broken`, {
// PUT without settings preserves the (now-cleared) absence; the next
// save persists the flat shape with no `settings` field.
const putRes = await fetch(`${h.baseUrl}/api/servers/legacy`, {
method: "PUT",
headers: { "Content-Type": "application/json" },
body: JSON.stringify({
@ -785,10 +787,108 @@ describe("/api/servers routes", () => {
}),
});
expect(putRes.status).toBe(200);
const stored = readConfig(h.configPath).mcpServers.broken as {
settings?: unknown;
const stored = readConfig(h.configPath).mcpServers
.legacy as unknown as Record<string, unknown>;
expect(stored).not.toHaveProperty("settings");
expect(stored).not.toHaveProperty("headers");
});
it("drops individually malformed Inspector-extension fields on read (read-path shape validation)", async () => {
// A hand-edited mcp.json with a mix of valid and malformed
// Inspector-extension fields. `normalizeMcpServers` drops each bad
// field independently with a warn — so one wrong key doesn't take
// out the whole entry, and garbage values can't reach the form via
// the disk → memory converter.
writeFileSync(
h.configPath,
JSON.stringify({
mcpServers: {
bad: {
type: "streamable-http",
url: "https://x.test/mcp",
// Good: should round-trip
headers: { "X-Keep": "yes" },
// Bad: string instead of pair-array → drop
metadata: "oops",
// Bad: non-number timeout → drop
connectionTimeout: "30s",
// Good: valid number
requestTimeout: 60000,
// Bad: array instead of object → drop
oauth: ["not", "an", "object"],
},
},
}),
);
const getRes = await fetch(`${h.baseUrl}/api/servers`);
expect(getRes.status).toBe(200);
const getBody = (await getRes.json()) as {
mcpServers: Record<string, Record<string, unknown>>;
};
expect(stored.settings).toBeUndefined();
const fetched = getBody.mcpServers.bad!;
// Good fields survive.
expect(fetched.headers).toEqual({ "X-Keep": "yes" });
expect(fetched.requestTimeout).toBe(60000);
// Bad fields are dropped.
expect(fetched).not.toHaveProperty("metadata");
expect(fetched).not.toHaveProperty("connectionTimeout");
expect(fetched).not.toHaveProperty("oauth");
});
it("loads a hand-edited file with top-level Claude Code-style `headers` (interop with `.mcp.json`)", async () => {
// A user pastes a server entry copied from the Claude Code docs:
// top-level `headers: { ... }`, no settings wrapper. GET should
// surface the entry verbatim (flat disk shape) and a subsequent
// settings-only PUT must preserve the headers when omitted.
writeFileSync(
h.configPath,
JSON.stringify({
mcpServers: {
"api-server": {
type: "streamable-http",
url: "https://api.example.com/mcp",
headers: { Authorization: "Bearer the-token" },
},
},
}),
);
const getRes = await fetch(`${h.baseUrl}/api/servers`);
expect(getRes.status).toBe(200);
const getBody = (await getRes.json()) as {
mcpServers: Record<string, Record<string, unknown>>;
};
expect(getBody.mcpServers["api-server"]!.headers).toEqual({
Authorization: "Bearer the-token",
});
// Settings-only PUT (no `config`) preserves the existing url AND the
// existing headers per the preserve-on-omit branch.
const putRes = await fetch(`${h.baseUrl}/api/servers/api-server`, {
method: "PUT",
headers: { "Content-Type": "application/json" },
body: JSON.stringify({
settings: {
headers: [
{ key: "Authorization", value: "Bearer the-token" },
{ key: "X-Tenant", value: "acme" },
],
metadata: [],
connectionTimeout: 0,
requestTimeout: 0,
},
}),
});
expect(putRes.status).toBe(200);
const stored = readConfig(h.configPath).mcpServers[
"api-server"
] as unknown as Record<string, unknown>;
expect(stored.url).toBe("https://api.example.com/mcp");
expect(stored.headers).toEqual({
Authorization: "Bearer the-token",
"X-Tenant": "acme",
});
});
});