registry/docs/reference/api/generic-registry-api.md
adam jones 4f453ff2bd
Drop GET /v0/servers/{serverName} endpoint (#618)
Remove redundant endpoint as suggested in #617. Clients should now use
`GET /v0/servers/{serverName}/versions/latest` instead (using `latest`
as a special version value in the existing endpoint).

This simplifies the API surface and reduces implementation burden for
subregistries, while maintaining a clear migration path for consumers.

## Changes
- Removed `GET /v0/servers/{serverName}` endpoint
- Updated `GET /v0/servers/{serverName}/versions/{version}` to accept
`latest` as special version
- Updated all tests to use new endpoint pattern
- Updated documentation and OpenAPI spec
- Added breaking change notice to CHANGELOG

Fixes #617

Co-authored-by: Claude <noreply@anthropic.com>
2025-10-07 13:56:45 +03:00

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# Generic Registry API Specification
A standardized RESTful HTTP API for MCP registries to provide consistent endpoints for discovering and retrieving MCP servers.
Also see:
- For guidance consuming the API, see the [consuming guide](../../guides/consuming/use-rest-api.md).
## Browse the Complete API Specification
**📋 View the full API specification interactively**: Open [openapi.yaml](./openapi.yaml) in an OpenAPI viewer like [Stoplight Elements](https://elements-demo.stoplight.io/?spec=https://raw.githubusercontent.com/modelcontextprotocol/registry/refs/heads/main/docs/reference/api/openapi.yaml).
The official registry has some more endpoints and restrictions on top of this. See the [official registry API spec](./official-registry-api.md) for details.
## Quick Reference
### Core Endpoints
- **`GET /v0/servers`** - List all servers with pagination
- **`GET /v0/servers/{serverName}/versions`** - List all versions of a server
- **`GET /v0/servers/{serverName}/versions/{version}`** - Get specific version of server. Use the special version `latest` to get the latest version.
- **`POST /v0/publish`** - Publish new server (optional, registry-specific authentication)
Server names and version strings should be URL-encoded in paths.
### Authentication
- **Read operations**: No authentication required
- **Write operations**: Registry-specific authentication (if supported)
### Content Type
All requests and responses use `application/json`
### Pagination
List endpoints use cursor-based pagination for efficient, stable results.
#### Usage
1. **Initial request**: Omit the `cursor` parameter
2. **Subsequent requests**: Use the `nextCursor` value from the previous response
3. **End of results**: When `nextCursor` is null or empty, there are no more results
**Important**: Always treat cursors as opaque strings. Never manually construct or modify cursor values.
### Basic Example: List Servers
```bash
curl https://registry.example.com/v0/servers?limit=10
```
```json
{
"servers": [
{
"server": {
"name": "io.modelcontextprotocol/filesystem",
"description": "Filesystem operations server",
"version": "1.0.2"
},
"_meta": {
"io.modelcontextprotocol.registry/official": {
"status": "active",
"publishedAt": "2025-01-01T10:30:00Z",
"isLatest": true
}
}
}
],
"metadata": {
"count": 10,
"nextCursor": "com.example/my-server:1.0.0"
}
}
```
For complete endpoint documentation, view the OpenAPI specification in a schema viewer.