utcp-mcp

UTCP-MCP Bridge provides an MCP server that exposes UTCP “manuals” as MCP tools. It can be run via npx (no install step for the user) and is configured through a .utcp_config.json to register HTTP/OpenAPI-based tools, post-process tool outputs, and manage tool discovery/execution from an MCP client (e.g., Claude Desktop).

Evaluated Mar 30, 2026 (21d ago)
Repo ↗ DevTools ai-agent mcp model-context-protocol utcp tool-calling http openapi typescript npm bridge
⚙ Agent Friendliness
46
/ 100
Can an agent use this?
🔒 Security
41
/ 100
Is it safe for agents?
⚡ Reliability
32
/ 100
Does it work consistently?

Score Breakdown

⚙ Agent Friendliness

MCP Quality
78
Documentation
62
Error Messages
0
Auth Simplicity
25
Rate Limits
20

🔒 Security

TLS Enforcement
70
Auth Strength
20
Scope Granularity
10
Dep. Hygiene
60
Secret Handling
55

The README suggests loading env vars (dotenv) and using per-project configs, which can help isolate secrets, but it does not document safe secret handling (logging/redaction) or transport/authz controls for the MCP server. TLS enforcement is assumed in typical deployments but not stated. No rate-limit or abuse-mitigation guidance is provided, and dependencies are only listed (no vulnerability posture given).

⚡ Reliability

Uptime/SLA
0
Version Stability
55
Breaking Changes
40
Error Recovery
35
AF Security Reliability

Best When

You want a universal MCP bridge to rapidly expose many external HTTP/OpenAPI tools to agents, backed by a UTCP config that can be updated per project.

Avoid When

You need explicit guidance on authentication, authorization scopes, rate-limits, and operational guarantees; also if you cannot validate the runtime behavior of the underlying UTCP/MCP tool execution.

Use Cases

  • Expose UTCP tool definitions (especially HTTP/OpenAPI-based endpoints) to an MCP client as callable tools
  • Centralize tool registration/search/list/inspection and execution through MCP
  • Bridge an existing UTCP configuration into MCP clients without writing an MCP server per API
  • Filter/shape tool outputs via configurable post-processing before returning to the agent

Not For

  • Production environments needing strong documented security controls at the MCP layer (auth, scopes, rate limits) without reviewing implementation
  • Use cases requiring guaranteed idempotent semantics for tool execution (not documented)
  • Workflows that require a stable, documented REST/OpenAPI interface beyond the MCP protocol

Interface

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

Authentication

Methods: MCP client -> bridge transport (unspecified in README) Environment variables for UTCP/HTTP credentials via UTCP_CONFIG_FILE-driven config (dotenv loader supported)
OAuth: No Scopes: No

README does not describe an authentication mechanism for the MCP server itself (e.g., API keys, OAuth, per-tool permissions). It only indicates environment-variable loading for downstream tool requirements.

Pricing

Free tier: No
Requires CC: No

No pricing information provided; distribution appears via npm/npx for local execution.

Agent Metadata

Pagination
none
Idempotent
False
Retry Guidance
Not documented

Known Gotchas

  • npx runs/downloads the latest version by default per README claim; this can cause behavioral drift unless pinned
  • Tool registration/execution behavior and error semantics are not described in README; agents may need additional probing/guardrails
  • Authentication/authorization for the MCP server is not documented; if the bridge is reachable beyond local trust boundaries, you may need to add network-level controls

Alternatives

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

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Packages Evaluated
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Need Evaluation
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