fastapi_mcp_sse

Provides a FastAPI example server that exposes MCP (Model Context Protocol) tool access over Server-Sent Events (SSE), alongside standard FastAPI web routes (e.g., /docs, /redoc).

Evaluated Mar 30, 2026 (21d ago)
Repo ↗ DevTools fastapi mcp sse python api-server ai-integration
⚙ Agent Friendliness
39
/ 100
Can an agent use this?
🔒 Security
24
/ 100
Is it safe for agents?
⚡ Reliability
28
/ 100
Does it work consistently?

Score Breakdown

⚙ Agent Friendliness

MCP Quality
55
Documentation
70
Error Messages
0
Auth Simplicity
20
Rate Limits
10

🔒 Security

TLS Enforcement
30
Auth Strength
10
Scope Granularity
0
Dep. Hygiene
50
Secret Handling
40

README does not mention TLS requirements, authentication/authorization, scopes, or secret-handling practices. Treat exposed MCP endpoints as sensitive and add appropriate access control, network protections, and TLS when deploying. Dependency hygiene cannot be fully verified from the provided manifest/README alone.

⚡ Reliability

Uptime/SLA
0
Version Stability
45
Breaking Changes
40
Error Recovery
25
AF Security Reliability

Best When

You want a lightweight reference implementation to integrate MCP tool serving into a FastAPI application using SSE.

Avoid When

You need enterprise-grade security controls, formal API contracts (e.g., OpenAPI for MCP endpoints), and documented operational guarantees (SLA, retries, idempotency).

Use Cases

  • Exposing MCP tools to an AI client using SSE transport
  • Embedding an MCP tool gateway inside an existing FastAPI app
  • Testing/debugging MCP tool calls via an MCP Inspector workflow

Not For

  • Production deployments that require strong access control/auth and documented security policies
  • Use cases needing a hosted managed MCP service with SLAs
  • Environments where strict API rate-limit guarantees and explicit headers are required

Interface

REST API
Yes
GraphQL
No
gRPC
No
MCP Server
Yes
SDK
No
Webhooks
No

Authentication

OAuth: No Scopes: No

No authentication/authorization mechanism is described in the provided README content; MCP/SSE endpoints appear unauthenticated in the example.

Pricing

Free tier: No
Requires CC: No

Open-source example (MIT). Costs depend on where you host/run it; no SaaS pricing indicated.

Agent Metadata

Pagination
none
Idempotent
False
Retry Guidance
Not documented

Known Gotchas

  • Likely assumes local development defaults (localhost URLs, default port 8000).
  • No stated auth; agents should not expose it publicly without adding access control.
  • SSE delivery semantics/timeouts may require client-side handling depending on the MCP Inspector/Continue client.

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Scores are editorial opinions as of 2026-03-30.

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