djangorestframework-mcp-server 0.3.0

Expose djangorestframework-services services and selectors as an MCP (Model Context Protocol) server.

djangorestframework-mcp-server

Expose djangorestframework-services services and selectors as a Model Context Protocol (MCP) server, conforming to MCP 2025-11-25 (Streamable HTTP).

Idea

Register ServiceSpec instances directly — no DRF router or viewset involvement. The unit of registration is the ServiceSpec, not a view.

from django.urls import include, path
from rest_framework_services.types.selector_spec import SelectorSpec
from rest_framework_services.types.service_spec import ServiceSpec

from rest_framework_mcp import MCPServer

server = MCPServer(name="my-app")

server.register_service_tool(
    name="invoices.create",
    spec=ServiceSpec(
        service=create_invoice,
        input_serializer=InvoiceInputSerializer,
        output_serializer=InvoiceOutputSerializer,
    ),
)

server.register_resource(
    name="invoice",
    uri_template="invoices://{pk}",
    selector=SelectorSpec(
        selector=get_invoice,
        output_serializer=InvoiceOutputSerializer,
    ),
)

urlpatterns = [path("mcp/", include(server.urls))]

A decorator form is also supported (@server.service_tool(...) / @server.resource(...)). See the quickstart for the full end-to-end recipe.

• Services (mutations) → MCP tools.
• Selectors (reads) → MCP resources.
• A single /mcp endpoint speaks Streamable HTTP. The /.well-known/oauth-protected-resource endpoint comes mounted alongside.

What ships

• Tools — tools/list, tools/call for register_service_tool (mutations) and register_selector_tool (reads, with optional FilterSet + ordering + pagination).
• Resources — resources/list, resources/templates/list, resources/read against SelectorSpec-backed callables; RFC 6570 templated URIs.
• Prompts — prompts/list, prompts/get against render callables returning strings, PromptMessages, or async coroutines.
• Pluggable auth — DjangoOAuthToolkitBackend (default) and AllowAnyBackend (dev only). Per-binding MCPPermission classes (ScopeRequired, DjangoPermRequired) plus your own.
• RFC 8707 audience binding when RESOURCE_URL is configured; RFC 9728 PRM served from the configured backend.
• Per-binding rate limits — MCPRateLimit Protocol with FixedWindowRateLimit, SlidingWindowRateLimit, and TokenBucketRateLimit implementations shipped.
• Output formats — JSON (default) and TOON (token-oriented; optional extra with safe JSON fallback).
• Async POST/DELETE + GET-side SSE push — sync urls for WSGI, async_urls for ASGI; MCPServer.notify(session_id, payload) pushes JSON-RPC frames on the session's SSE stream. Per-worker InMemorySSEBroker or cross-worker RedisSSEBroker (behind [redis]); Last-Event-ID resume via InMemorySSEReplayBuffer / RedisSSEReplayBuffer.
• OpenTelemetry instrumentation — mcp.tools.call, mcp.resources.read, mcp.prompts.get spans (no-op without the [otel] extra installed).
• Origin allowlist + protocol-version validation + session lifecycle per the 2025-11-25 transport rules.

Install

pip install djangorestframework-mcp-server                              # JSON only
pip install "djangorestframework-mcp-server[toon]"                      # +TOON encoder
pip install "djangorestframework-mcp-server[oauth]"                     # +django-oauth-toolkit backend
pip install "djangorestframework-mcp-server[redis]"                     # +Redis SSE broker for multi-worker ASGI
pip install "djangorestframework-mcp-server[otel]"                      # +OpenTelemetry instrumentation
pip install "djangorestframework-mcp-server[filter]"                    # +django-filter for selector-tool FilterSets
pip install "djangorestframework-mcp-server[spectacular]"               # +drf-spectacular schema overrides
pip install "djangorestframework-mcp-server[toon,oauth,redis,otel,filter,spectacular]"  # everything

…or with uv:

uv add djangorestframework-mcp-server                                   # JSON only
uv add "djangorestframework-mcp-server[toon]"                           # +TOON encoder
uv add "djangorestframework-mcp-server[oauth]"                          # +django-oauth-toolkit backend
uv add "djangorestframework-mcp-server[redis]"                          # +Redis SSE broker for multi-worker ASGI
uv add "djangorestframework-mcp-server[otel]"                           # +OpenTelemetry instrumentation
uv add "djangorestframework-mcp-server[filter]"                         # +django-filter for selector-tool FilterSets
uv add "djangorestframework-mcp-server[spectacular]"                    # +drf-spectacular schema overrides
uv add "djangorestframework-mcp-server[toon,oauth,redis,otel,filter,spectacular]"  # everything

Optional extras degrade gracefully: TOON falls back to JSON with a runtime warning if python-toon is not installed, and the OAuth backend module imports cleanly without oauth2_provider — the ImportError only fires when you actually configure it.

Try it

Install mcp-inspector and point it at your dev server:

npx @modelcontextprotocol/inspector --url http://localhost:8000/mcp/

Inspector lists tools, fills in arguments from the generated JSON Schema, and walks the OAuth auth flow against your configured Authorization Server.

Documentation

• Quickstart — copy-pasteable end-to-end.
• Concepts — tools vs resources, sessions, output formats.
• Authentication — backends, permissions, audience binding, bring-your-own AS recipe.
• Recipes — focused cookbook entries.
• Reference — autodocs for every public symbol.

License

MIT.