Building an MCP tool to connect to Upwork API and retrieve job listings MCP Connectors

MCP Verification Gate: conformance and disclosure checker for MCP servers A

Conformance checker for MCP servers. Free, no key, verdicts recomputable and re-measured daily.

Developer Tools Testing & QA Tools API Testing

511

oasdiff A

Detect breaking changes, generate changelogs, diff, and validate OpenAPI specs.

API Testing Developer Tools CI/CD & DevOps

42

TestMCP.dev A

Free platform to test MCP clients without installing anything. Create mock tools with dynamic templates, configurable delays, conditions (if/then), and response sequences. Supports JSON-RPC 2.0 over Streamable HTTP. Built-in text_echo and json_echo tools. Rate-limited tiers: anonymous (5 calls/min, 1 mock tool), registered (10 calls/min, 4 mock tools), premium (60 calls/min, unlimited). Zero setup — no install, no registration required. More info: https://www.testmcp.dev

API Testing Testing & QA Tools

22

surf A

Point Gecko at an OpenAPI spec; get first-call-correct, auth-hidden agent tools.

API Testing Developer Tools

126

Apiosk Connect A

Discover, pay for, execute, and publish APIs through Apiosk.

Developer Tools Payments & Billing API Testing

52

JMeter A

Point Claude Code, Qwen Code, Cursor, or any MCP client at https://docs.jmeter.ai/api/mcp and your agent answers JMeter questions grounded in this documentation, with a source link for every answer. Free, no API key, no signup.

API Testing Testing & QA Tools Documentation Access

101

Webhook Studio A

Keyless webhook endpoints: capture, wait, replay, forward, and generate types from real traffic.

API Testing Developer Tools

172

Regex/Email/URL Validator A

Regex matching, email/URL format validation, and JSON Schema validation.

API Testing Testing & QA Tools Developer Tools

41

marketplace A

Search the JoJ API marketplace, read endpoint docs, and call any API with one key via one gateway.