Monitoring · x402 · early usage

Should my agent pay this x402 endpoint

by api.nohumans.directory · discovered, not yet claimed by its owner · updated 2026-10-13

30d calls10

30d payers2

MethodGET

Outputjson

Mirrored from Coinbase's public x402 Bazaar. The description is the provider's own text and has not been reviewed here; the payment requirements are copied as published.

What it does

Should my agent pay this x402 endpoint? For any listing in nohumans.directory (id from /v1/discover), one call returns pay, caution or avoid with plain reasons: probe history and latency, whether its payment address is stable, whether we bought from it ourselves and it delivered (with the on-chain tx), its on-chain payments in the last 30 days, and whether the live price matches the listed one. Check before spending on an unfamiliar paid API.

Tags: trust-score · reputation · due-diligence · fraud-check · pre-spend · bazaar · builder-code

Call contract

Method: GET
Input: path parameters
Output: json
Last paid call: 2026-10-13

Input example from Bazaar metadata

{
  "id": "9a8bf56d-2fc"
}

Output example

{
  "as_of": 1790000000,
  "endpoint_url": "https://seller.example/v1/quote",
  "listing_id": "00000000-000",
  "method_note": null,
  "onchain_30d": {
    "payments": 212,
    "source": "base",
    "unique_payers": 9,
    "volume_usd": 1.06
  },
  "paid_verification": {
    "tx_hash": "0x…",
    "verified": true
  },
  "payto": {
    "address": "0x…",
    "distinct_recent": 1,
    "first_seen_at": 1788200000,
    "shared_by_listings": 1,
    "stable_since": 1788200000,
    "unstable": false
  },
  "price": {
    "declared": 0.005,
    "matches": true,
    "observed_usd": 0.005
  },
  "probe": {
    "consecutive_failures": 0,
    "last_probed_at": 1789999100,
    "last_reason": null,
    "neutral_streak": 0,
    "p50_latency_ms": 180,
    "p95_latency_ms": 420,
    "probe_count": 1450,
    "score": 0.98
  },
  "purchase_history": "https://api.nohumans.directory/v1/listings/00000000-000/purchases",
  "reasons": [
    "verified, delivering when paid, stable payTo, price as declared"
  ],
  "rule": "https://nohumans.directory/methodology#verdict",
  "self_referential": false,
  "status": "verified",
  "verdict": "pay",
  "verification_rule": "https://nohumans.directory/methodology#wg-verification",
  "verified_via": "POST"
}

Use with an agent

Discover. Agents find this listing with GET https://bazaar.saylorinnovations.com/discovery/search?query=…, the MCP tool search_resources, or /discovery/resources.
Inspect. Fetch /resources/29813.json for the price and payment options.
Pay. Call GET https://api.nohumans.directory/v1/listings/:id/verdict. The provider answers 402 with its payment requirements. An x402 client signs one of the options below and retries with PAYMENT-SIGNATURE.
Execute. The provider returns 200 with the data. Agent Bazaar is not in the request path and never sees your payment.

For humans

You don't need an account or an API key; you need a wallet holding a small amount of USDC on Base, and an x402-capable client (see the examples below). Call the endpoint unpaid first to see exactly what it asks for.

Pricing & payment

Price: $0.005 / request
Protocol: x402 v2
Auth: No account or API key. Pay per request.
Networks: Base
Demand: 10 calls · 2 unique payers in 30d (public x402 Bazaar data)

x402 payment requirements

Scheme	Network	Asset	Amount	Pay to	Timeout
exact	Base eip155:8453	USDC	$0.005	0xA733875f2F7E8A2817040B5c60B63Ae07D58a1d6	60s

accepts[] (raw JSON)

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0xA733875f2F7E8A2817040B5c60B63Ae07D58a1d6",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "5000",
    "amountUsd": 0.005,
    "maxTimeoutSeconds": 60
  }
]

Schemas

Output schema (JSON Schema)

{
  "properties": {
    "example": {
      "properties": {
        "as_of": {
          "type": "integer"
        },
        "endpoint_url": {
          "type": "string"
        },
        "listing_id": {
          "type": "string"
        },
        "method_note": {
          "type": [
            "string",
            "null"
          ]
        },
        "onchain_30d": {
          "properties": {
            "payments": {
              "type": [
                "integer",
                "null"
              ]
            },
            "source": {
              "type": [
                "string",
                "null"
              ]
            },
            "unique_payers": {
              "type": [
                "integer",
                "null"
              ]
            },
            "volume_usd": {
              "type": [
                "number",
                "null"
              ]
            }
          },
          "type": "object"
        },
        "paid_verification": {
          "description": "our own real purchase from this endpoint and whether it delivered",
          "properties": {
            "tx_hash": {
              "type": [
                "string",
                "null"
              ]
            },
            "verified": {
              "type": "boolean"
            }
          },
          "type": "object"
        },
        "payto": {
          "properties": {
            "address": {
              "type": [
                "string",
                "null"
              ]
            },
            "distinct_recent": {
              "type": [
                "integer",
                "null"
              ]
            },
            "first_seen_at": {
              "type": [
                "integer",
                "null"
              ]
            },
            "shared_by_listings": {
              "type": [
                "integer",
                "null"
              ]
            },
            "stable_since": {
              "type": [
                "integer",
                "null"
              ]
            },
            "unstable": {
              "type": "boolean"
            }
          },
          "type": "object"
        },
        "price": {
          "properties": {
            "declared": {
              "type": [
                "number",
                "null"
              ]
            },
            "matches": {
              "type": [
                "boolean",
                "null"
              ]
            },
            "observed_usd": {
              "type": [
                "number",
                "null"
              ]
            }
          },
          "type": "object"
        },
        "probe": {
          "properties": {
            "consecutive_failures": {
              "type": [
                "integer",
                "null"
              ]
            },
            "last_probed_at": {
              "type": [
                "integer",
                "null"
              ]
            },
            "last_reason": {
              "type": [
                "string",
                "null"
              ]
            },
            "neutral_streak": {
              "type": "integer"
            },
            "p50_latency_ms": {
              "type": [
                "number",
                "null"
              ]
            },
            "p95_latency_ms": {
              "type": [
                "number",
                "null"
              ]
            },
            "probe_count": {
              "type": [
                "integer",
                "null"
              ]
            },
            "score": {
              "type": [
                "number",
                "null"
              ]
            }
          },
          "type": "object"
        },
        "purchase_history": {
          "type": "string"
        },
        "reasons": {
          "description": "why, in plain words",
          "items": {
            "type": "string"
          },
          "type": "array"
        },
        "rule": {
          "type": "string"
        },
        "self_referential": {
          "description": "true when nohumans.directory operates this endpoint (by host or by the payTo its live challenge names): the verdict is then not an independent check and is never better than caution",
          "type": "boolean"
        },
        "status": {
          "description": "verified, unverified or failing",
          "type": "string"
        },
        "verdict": {
          "description": "pay, caution or avoid",
          "enum": [
            "pay",
            "caution",
            "avoid"
          ],
          "type": "string"
        },
        "verification": {
          "description": "x402 WG draft verifier object; our verdict cites it. See verification_rule",
          "type": [
            "object",
            "null"
          ]
        },
        "verification_rule": {
          "type": "string"
        },
        "verified_via": {
          "type": [
            "string",
            "null"
          ]
        }
      },
      "required": [
        "listing_id",
        "verdict",
        "reasons",
        "as_of",
        "rule"
      ],
      "type": "object"
    },
    "type": {
      "type": "string"
    }
  },
  "required": [
    "type"
  ],
  "type": "object"
}

Example shape — generated from the schema, not a captured live response

{
  "example": {
    "as_of": 0,
    "endpoint_url": "string",
    "listing_id": "string",
    "method_note": "string",
    "onchain_30d": {
      "payments": 0,
      "source": "string",
      "unique_payers": 0,
      "volume_usd": 0
    },
    "paid_verification": {
      "tx_hash": "string",
      "verified": true
    },
    "payto": {
      "address": "string",
      "distinct_recent": 0,
      "first_seen_at": 0,
      "shared_by_listings": 0,
      "stable_since": 0,
      "unstable": true
    },
    "price": {
      "declared": 0,
      "matches": true,
      "observed_usd": 0
    },
    "probe": {
      "consecutive_failures": 0,
      "last_probed_at": 0,
      "last_reason": "string",
      "neutral_streak": 0,
      "p50_latency_ms": 0,
      "p95_latency_ms": 0,
      "probe_count": 0,
      "score": 0
    },
    "purchase_history": "string",
    "reasons": [
      "string"
    ],
    "rule": "string",
    "self_referential": true,
    "status": "string",
    "verdict": "pay",
    "verification": {},
    "verification_rule": "string",
    "verified_via": "string"
  },
  "type": "string"
}

Examples

curl

curl "https://api.nohumans.directory/v1/listings/:id/verdict"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

const res = await fetch("https://api.nohumans.directory/v1/listings/:id/verdict");
if (res.status === 402) {
  const { accepts } = await res.json();
  // pay one of accepts[] via an x402 client, then retry with the payment header
}

Python

import httpx
res = httpx.get("https://api.nohumans.directory/v1/listings/:id/verdict")
if res.status_code == 402:
    accepts = res.json()["accepts"]
    # pay one of accepts[] via an x402 client, then retry with the payment header

Details

Provider: api.nohumans.directory
Endpoint: https://api.nohumans.directory/v1/listings/:id/verdict
Machine-readable: /resources/29813.json