A versioned public contract
The API lives under /api/v1 and requires no API key. Use /api/v1/services for search, /api/v1/services/{slug} for details, and /api/v1/methodologies/current for the rating formula and boundaries.
Responses include data and snapshot metadata: fetch time, stale-cache state, and API version.
Find an ATH Index with one request
Public reads need no API key. Search through /api/v1/services, then read athTransparencyIndex together with athTransparencyCoverage, athTransparencyVersion, and agentTrustCriteria.
athTransparencyIndex uses a 0–100 scale with no stars. agentTrustCriteria contains eight keys: provenance 15%, capabilities 15%, connectivity 15%, protocol-discovery 10%, technical-evidence 15%, security-transparency 10%, commercial-transparency 10%, and freshness 10%.
Open /api/v1/services/{slug} to inspect provenance, raw fields, sourceUrl, and freshness. The presence of an agentTrustCriteria item does not prove supporting evidence: the array always contains all eight diagnostic values. Unknown criteria are excluded from the calculation and lower athTransparencyCoverage. Preserve meta.fetchedAt and meta.stale when presenting the result.
GET https://agenttrusthub.cc/api/v1/services?q=research&limit=10
Evidence instead of a ready-made verdict
ATH Transparency Index is one source for AI-product selection, not a guarantee of quality, safety, availability, or results. Always consider coverage, criteria, and freshness.
An application or agent should show the index, coverage, and raw fields, preserve unknown information, and apply its own risk policy. ratingAverage and ratingCount refer only to user reviews.
Connect AI assistants
Local clients Codex, Claude Code, Gemini CLI, GitHub Copilot, Visual Studio Code, Cursor, Windsurf, and Cline use the auditable HTTPS /install/{client} installer. It writes only one Agent Trust Hub skill to the client's documented user directory.
ChatGPT can use the public OpenAPI 3.1 definition in a workflow with external tools. Grok and Perplexity use the universal skill.md URL manually as a source or custom instruction where the client supports it; no native integration is claimed.
Connect with the public OpenAPI definition
Use this read-only OpenAPI 3.1 URL in a ChatGPT workflow that supports external tools.
Multi-step OpenAPI or connector setup in a compatible client.
https://agenttrusthub.cc/api/openapi.jsonCopy this request for any assistant.
Find an AI product for research. Compare ATH Index and data coverage, check user reviews separately, and cite the sources.- Codex — ~/.agents/skills/agent-trust-hub/SKILL.md
- Claude Code — ~/.claude/skills/agent-trust-hub/SKILL.md
- Gemini CLI — ~/.gemini/skills/agent-trust-hub/SKILL.md
- GitHub Copilot and Visual Studio Code — ~/.copilot/skills/agent-trust-hub/SKILL.md
- Cursor — ~/.cursor/skills/agent-trust-hub/SKILL.md
- Windsurf — ~/.codeium/windsurf/skills/agent-trust-hub/SKILL.md
- Cline — ~/.cline/skills/agent-trust-hub/SKILL.md; enable Cline's experimental Agent Skills feature before use.
OpenAPI and updates
The contract is described in OpenAPI 3.1. Read-only responses use short-lived caching and support browser clients. The JSON API, RSS, and website read one published feed. In live mode it shows entries from allowlisted official sources; when that mode is unavailable, the site clearly labels its reviewed editorial collection.
Frequently asked questions
Is ATH Index a user rating?
No. ATH Transparency Index uses a 0–100 scale and measures the transparency of evidenced data. User Rating uses a 1–5 scale and is calculated separately only from eligible published reviews.
Do I need an API key?
No. The public Agent Trust Hub API is read-only and requires no API key.
How should an assistant choose a product?
Compare athTransparencyIndex with athTransparencyCoverage, athTransparencyVersion, price, freshness, and agentTrustCriteria, then open sourceUrl and cite the source. Never convert ATH Index into stars.
What this release does not include
The public API neither requires nor issues API keys. This release has no remote MCP, signed snapshots, wallets, or paid checks.