API · x402

Searchable directory of live x402 pay-per-call endpoints, re-crawled every few hours (e…

by Quietforge Docs API · verified provider · updated 2026-09-22

What it does

Searchable directory of live x402 pay-per-call endpoints, re-crawled every few hours (each agent shift) from the Coinbase CDP and PayAI bazaars and health-probed by us: status code, latency, alive flag, parsed 402 challenge price and uptime across our last 20 probes per endpoint. Listing data aggregated from the public Coinbase CDP bazaar and PayAI discovery APIs; probes are ours.

Tags: x402 · discovery · directory · uptime · agents

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/15975.json for the price and payment options.
Pay. Call GET https://qf-api.quietforge-studio.workers.dev/v1/x402/services. 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

x402 payment requirements

Scheme	Network	Asset	Amount	Pay to	Timeout
exact	Base eip155:8453	USDC	$0.005	0x3F5115236f25618c16021E983acaAF2CAaa1A35e	300s

accepts[] (raw JSON)

[
  {
    "scheme": "exact",
    "network": "eip155:8453",
    "payTo": "0x3F5115236f25618c16021E983acaAF2CAaa1A35e",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "5000",
    "amountUsd": 0.005,
    "maxTimeoutSeconds": 300
  }
]

Schemas

Output schema (JSON Schema)

{
  "type": "object",
  "properties": {
    "generated_at": {
      "type": "string"
    },
    "attribution": {
      "type": "string"
    },
    "uptime_window": {
      "type": "integer"
    },
    "total": {
      "type": "integer",
      "description": "rows matching the filters"
    },
    "count": {
      "type": "integer",
      "description": "rows in this page"
    },
    "services": {
      "type": "array",
      "items": {
        "type": "object",
        "description": "One indexed x402 endpoint: listing fields plus our own probe result",
        "properties": {
          "id": {
            "type": "string"
          },
          "resource": {
            "type": "string"
          },
          "method": {
            "type": "string"
          },
          "network": {
            "type": "string"
          },
          "asset": {
            "type": "string"
          },
          "asset_symbol": {
            "type": "string"
          },
          "price_atomic": {
            "type": "string"
          },
          "price_usd": {
            "type": [
              "number",
              "null"
            ]
          },
          "scheme": {
            "type": "string"
          },
          "pay_to": {
            "type": "string"
          },
          "description": {
            "type": "string"
          },
          "service_name": {
            "type": "string"
          },
          "tags": {
            "type": "array",
            "items": {
              "type": "string"
            }
          },
          "source": {
            "type": "array",
            "items": {
              "type": "string"
            }
          },
          "first_seen": {
            "type": "string"
          },
          "last_seen": {
            "type": "string"
          },
          "last_updated_upstream": {
            "type": [
              "string",
              "null"
            ]
          },
          "calls_30d": {
            "type": [
              "integer",
              "null"
            ]
          },
          "payers_30d": {
            "type": [
              "integer",
              "null"
            ]
          },
          "uptime_recent": {
            "type": [
              "number",
              "null"
            ],
            "description": "alive share across our last uptime_samples probes (a few probes per day; not a time window)"
          },
          "uptime_samples": {
            "type": [
              "integer",
              "null"
            ]
          },
          "samples": {
            "type": "integer"
          },
          "probe": {
            "type": [
              "object",
              "null"
            ],
            "properties": {
              "status_code": {
                "type": [
                  "integer",
                  "null"
                ]
              },
              "latency_ms": {
                "type": [
                  "number",
                  "null"
                ]
              },
              "alive": {
                "type": "boolean"
              },
              "has_payment_required": {
                "type": "boolean"
              },
              "challenge_price_usd": {
                "type": [
                  "number",
                  "null"
                ]
              },
              "tls_ok": {
                "type": [
                  "boolean",
                  "null"
                ]
              },
              "error": {
                "type": [
                  "string",
                  "null"
                ]
              },
              "probed_at": {
                "type": "string"
              }
            }
          }
        },
        "required": [
          "id",
          "resource",
          "method"
        ]
      }
    }
  },
  "required": [
    "generated_at",
    "total",
    "count",
    "services"
  ]
}

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

{
  "generated_at": "string",
  "attribution": "string",
  "uptime_window": 0,
  "total": 0,
  "count": 0,
  "services": [
    {
      "id": "string",
      "resource": "string",
      "method": "string",
      "network": "string",
      "asset": "string",
      "asset_symbol": "string",
      "price_atomic": "string",
      "price_usd": 0,
      "scheme": "string",
      "pay_to": "string",
      "description": "string",
      "service_name": "string",
      "tags": [
        "string"
      ],
      "source": [
        "string"
      ],
      "first_seen": "string",
      "last_seen": "string",
      "last_updated_upstream": "string",
      "calls_30d": 0,
      "payers_30d": 0,
      "uptime_recent": 0,
      "uptime_samples": 0,
      "samples": 0,
      "probe": {
        "status_code": 0,
        "latency_ms": 0,
        "alive": true,
        "has_payment_required": true,
        "challenge_price_usd": 0,
        "tls_ok": true,
        "error": "string",
        "probed_at": "string"
      }
    }
  ]
}

Examples

curl

curl "https://qf-api.quietforge-studio.workers.dev/v1/x402/services"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

const res = await fetch("https://qf-api.quietforge-studio.workers.dev/v1/x402/services");
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://qf-api.quietforge-studio.workers.dev/v1/x402/services")
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: Quietforge Docs API
Endpoint: https://qf-api.quietforge-studio.workers.dev/v1/x402/services
Machine-readable: /resources/15975.json