"How to make API calls in code" matching MCP connectors:
Matching Connector Tools:
Prompt evals over MCP: run a prompt on your dataset, score each output 1-5 with an LLM judge.
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
Check that your AI is being logical. Free tool that mathematically catches contradictions in agent reasoning. No account needed. Also offers paid guardrails that converts natural language to formal verification proofs, that anyone can check succinctly.
Design-system contract verification, scoring, and review tools for AI agents.
Give AI coding agents access to your Vynix visual feedback, bug reports, and AI diagnosis.
Read-only, deterministic AI triage and readiness tools implementing Sophon's published rubrics.
Check if your MCP server is ready to publish on the MCP Registry, Smithery, or npm.
Grade MCP servers A to F with the open behavioral litmus. npm: full toolset; hosted: lookups only.
Hire a real human for real-world verification, product testing, AI output review, and errands.
Deterministic validation for AI-generated artifacts: JSON Schema, OpenAPI response, SQL syntax.
Deterministic recipe verification engine — validates AI-generated recipes against master SOPs.
Email compatibility analysis across 15 clients — preview, audit, fix, diff, deliverability.
Verifies web animation vs WCAG 2.2.2/2.3.3: validated specs, deterministic reduced-motion-safe CSS.
Generate realistic, FK-consistent synthetic test data for your databases from your AI assistant.
Runs your code against a contract; returns HELD or BROKE at the exact input. Deterministic.
Test the voice agents you run: scored transcripts, pass/fail verdicts, latency and WER metrics.
Machine-readable taxonomy of 100+ AI system failure modes spanning factuality, alignment, planning, code generation, and instruction following.
MCP server for the Fail Modes taxonomy — a knowledge base of AI system failure modes
Scan URLs for WCAG 2.1 violations, generate AI fixes, and produce VPAT 2.5 compliance reports.