"Archive of Our Own" matching MCP connectors:
GET /v1/connectors – MCP directory API referenceMatching Connector Tools:
Check an A2A agent before you delegate, or an MCP server's measured conduct. Free, no key.
Risk-scan a diff, flag AI-generated-code tells, find secrets. 5 of 7 tools need no account.
Verify before the agent pays. Screwtape is an independent check on agent work before a payment goes out: invoices, duplicate invoices and reconciliation, with a signed receipt for your auditor. It is independent of your agent's own model and vendor, with no stake in your agent passing. - judge: pass, fail or retry verdict on one agent output, with a score, reasons and a next_step. Optional deterministic checks: required fields, types, formats, sums, regex. - check_duplicate_invoice (/v1/duplicate): opt-in duplicate-invoice check using keyed fingerprints. - consensus: scores agreement across 2 to 16 agent answers and flags false consensus. - Advisory mode: recommends approve, review or return; a person decides. - Receipts: Ed25519-signed. The receipt proves what was checked, when, and the verdict. Verify via POST /v1/receipts/verify or offline; export via GET /v1/receipts/export. - Judged content isn't stored unless you opt in. Free key: 100 calls/day. Or $0.005 USDC per call via x402 on Base or Solana, no key needed. MCP: https://screwtape.ai/mcp Docs: https://screwtape.ai/docs/ Icon: https://screwtape.ai/icon-512.png Tags: verification, evaluation, llm-as-judge, invoices, receipts, x402
Ensemble testing of web pages for accessibility, usability, and web standards
12 free MCP tools for local validation of emails, URLs, IP addresses, IBANs, dates, UUIDs, JSON and other structured inputs. No API key or external verification service required.
Independent schema and rule check of AI agent output before you pay. Signed attestation and receipt.
Benchmark your own prompt on 100+ models with real API calls, then choose the winner by accuracy, cost, speed, or any mix of those.
Receipts for what your AI coding agent says it verified. Short-lived API checks, keys kept out of the model
Evidence-gated task verification for AI agents. Decompose goals into acceptance criteria, attach proof (screenshot, curl, file), independent LLM judge accepts or rejects. 24 tools. Hosted remote MCP (streamable-http, OAuth 2.1 + DCR).
UI Verify is visual regression testing built for coding agents. Connect the MCP server and your agent (Claude Code, Cursor, Codex) pulls a pull request's UI changes into the conversation, views each visual diff, reads the AI judge's verdict of regression vs intended change, and accepts the intended baselines - all over MCP.
An open-source benchmark of how well LLMs solve nonogram puzzles, from 5x5 to 20x20.
Accessibility and WCAG data for your own websites: fix lists, live checks, and fix validation.
JSON healing, O(n) ReDoS defense, XML prompt compilation, and schema verification tools.
Accessibility audit of a web page (WCAG 2.2 AA, RGAA) and European Accessibility Act scope check
Check an agent skill before you install it: which of your skills will it clash with?
Score any website out of 100 for how well AI agents can find, understand and use it.
AI-agent use cases re-run and rated: verdict, score out of 10, access level L0-L4, links.
AI agents use your app like your users, in real browsers, and report what is broken or confusing.
Adversarial behavioural-bias engine — audits your decisions for cognitive biases via your own AI.
Benchmark your own prompt on 100+ LLMs with real API calls; pick the cheapest model that passes.
