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85 lines
2.5 KiB
Text
85 lines
2.5 KiB
Text
---
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title: Auth Utilities
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sidebarTitle: Auth
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description: Create and validate CIMD documents for OAuth
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icon: key
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---
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import { VersionBadge } from '/snippets/version-badge.mdx'
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<VersionBadge version="3.0.0" />
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The `fastmcp auth` commands help with CIMD (Client ID Metadata Document) management — part of MCP's OAuth authentication flow. A CIMD is a JSON document you host at an HTTPS URL to identify your client application to MCP servers.
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## Creating a CIMD
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`fastmcp auth cimd create` generates a CIMD document:
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```bash
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fastmcp auth cimd create \
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--name "My App" \
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--redirect-uri "http://localhost:*/callback"
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```
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```json
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{
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"client_id": "https://your-domain.com/oauth/client.json",
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"client_name": "My App",
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"redirect_uris": ["http://localhost:*/callback"],
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"token_endpoint_auth_method": "none"
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}
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```
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The generated document includes a placeholder `client_id` — update it to match the URL where you'll host the document before deploying.
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### Options
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| Option | Flag | Description |
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| ------ | ---- | ----------- |
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| Name | `--name` | **Required.** Human-readable client name |
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| Redirect URI | `--redirect-uri` | **Required.** Allowed redirect URIs (repeatable) |
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| Client URI | `--client-uri` | Client's home page URL |
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| Logo URI | `--logo-uri` | Client's logo URL |
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| Scope | `--scope` | Space-separated list of scopes |
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| Output | `--output`, `-o` | Save to file (default: stdout) |
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| Pretty | `--pretty` | Pretty-print JSON (default: true) |
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### Example
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```bash
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fastmcp auth cimd create \
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--name "My Production App" \
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--redirect-uri "http://localhost:*/callback" \
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--redirect-uri "https://myapp.example.com/callback" \
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--client-uri "https://myapp.example.com" \
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--scope "read write" \
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--output client.json
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```
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## Validating a CIMD
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`fastmcp auth cimd validate` fetches a hosted CIMD and verifies it conforms to the spec:
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```bash
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fastmcp auth cimd validate https://myapp.example.com/oauth/client.json
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```
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The validator checks that the URL is valid (HTTPS, non-root path), the document is valid JSON, the `client_id` matches the URL, and no shared-secret auth methods are used.
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On success:
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```
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→ Fetching https://myapp.example.com/oauth/client.json...
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✓ Valid CIMD document
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Document details:
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client_id: https://myapp.example.com/oauth/client.json
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client_name: My App
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token_endpoint_auth_method: none
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redirect_uris:
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• http://localhost:*/callback
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```
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| Option | Flag | Description |
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| ------ | ---- | ----------- |
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| Timeout | `--timeout`, `-t` | HTTP request timeout in seconds (default: 10) |
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