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nohumans.directory Listing Verdict
x402
nohumans.directory Listing Verdict is a paid API for AI agents from api.nohumans.directory, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-30).
Returns a pre-spend trust verdict for a specific API listing, including probe history, payTo address stability, and paid verification status.
Price / call$0.005
Success—
StatusUnknown
How this service works
Registry of paid x402 APIs and datasets for AI agents. Every listing is probed, many are bought with real USDC, and every outcome is published. Free API + MCP.
Output
A JSON object containing the verdict recommendation ('pay', 'skip', etc.), verification status, reasons for the verdict, payTo address details including stability and first-seen timestamp, and paid verification info including transaction hash and confirmation status.
Example use cases
Pre-spend safety check for agent
“My agent is about to call a paid API with listing ID 9a8bf56d-2fc — can you pull the nohumans.directory verdict first to confirm it's verified and the payTo address hasn't changed recently?”
Reputation audit before integration
“I'm considering integrating listing 3f7ac12b-1de from nohumans.directory into my workflow — can you check whether it has a clean probe history and a stable payTo address before I commit?”
Flagging suspicious listing
“Something feels off about listing a1c3e99d-7fb — can you check its nohumans.directory verdict to see if it's flagged, unverified, or has an unstable payTo address?”
Technical details
Endpoint
GEThttps://api.nohumans.directory/v1/listings/%7Bid%7D/verdict?utm_source=zero.xyzWhen to prefer
Use this endpoint when an AI agent needs to autonomously decide whether to spend cryptocurrency on an unknown x402 API — especially when the payTo address or listing reputation has not been independently verified. Prefer this over manual review when operating at scale or in automated pipelines where human oversight is absent.
Side effects
- Unknown or invalid listing ID returns a 404 or empty result
- Listing exists but has never been probed, returning no verdict
- PayTo address marked unstable if it changed recently
- Rate limiting or payment failure if the $0.005 USDC x402 payment is not properly handled
- Transient network errors from the directory service
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| required | string | |
| properties | string |
Output
Schema · Response
{
"type": "json",
"example": {
"rule": "https://nohumans.directory/methodology#verdict",
"as_of": 1790000000,
"payto": {
"address": "0x…",
"unstable": false,
"stable_since": 1788200000,
"first_seen_at": 1788200000,
"distinct_recent": 1,
"shared_by_listings": 1
},
"price": {
"matches": true,
"declared": 0.005,
"observed_usd": 0.005
},
"probe": {
"score": 0.98,
"last_reason": null,
"probe_count": 1450,
"last_probed_at": 1789999100,
"neutral_streak": 0,
"p50_latency_ms": 180,
"p95_latency_ms": 420,
"consecutive_failures": 0
},
"status": "verified",
"reasons": [
"verified, delivering when paid, stable payTo, price as declared"
],
"verdict": "pay",
"listing_id": "00000000-000",
"method_note": null,
"onchain_30d": {
"source": "base",
"payments": 212,
"volume_usd": 1.06,
"unique_payers": 9
},
"endpoint_url": "https://seller.example/v1/quote",
"verified_via": "POST",
"purchase_history": "https://api.nohumans.directory/v1/listings/00000000-000/purchases",
"self_referential": false,
"paid_verification": {
"tx_hash": "0x…",
"verified": true
},
"verification_rule": "https://nohumans.directory/methodology#wg-verification"
}
}Tags
x402
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