Blockchain Data · x402

Locus public pay-per-use API

by openrouter.x402.stage.paywithlocus.com · discovered, not yet claimed by its owner · updated 2026-08-30

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

Tags: bazaar · eip2612GasSponsoring

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/13819.json for the price and payment options.
Pay. Call GET https://openrouter.x402.stage.paywithlocus.com/openrouter/chat. 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: $0.010931 / request
Protocol: x402 v2
Auth: No account or API key. Pay per request.
Networks: Base
Calls (30d): 1 · 1 unique payers (third-party data from the public x402 Bazaar)

x402 payment requirements

Scheme	Network	Asset	Amount	Pay to	Timeout
upto	Base eip155:8453	USDC	$0.010931	0x3C5CBe28ECA3b96023c45D3f877da834F1C7d5fA	1800s

accepts[] (raw JSON)

[
  {
    "scheme": "upto",
    "network": "eip155:8453",
    "payTo": "0x3C5CBe28ECA3b96023c45D3f877da834F1C7d5fA",
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "amount": "10931",
    "amountUsd": 0.010931,
    "maxTimeoutSeconds": 1800
  }
]

Schemas

Output schema (JSON Schema)

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "max_tokens": 256,
          "messages": [
            {
              "content": "Hello from x402",
              "role": "user"
            }
          ],
          "model": "openai/gpt-oss-20b"
        },
        "bodyType": "json",
        "method": "POST",
        "type": "http"
      },
      "output": {
        "example": {
          "data": {},
          "payment": {
            "authorizedMaxUsdc": "0.001000",
            "scheme": "exact",
            "settledUsdc": "0.001000"
          },
          "request": {
            "id": "00000000-0000-4000-8000-000000000000",
            "statusUrl": "/requests/00000000-0000-4000-8000-000000000000"
          },
          "success": true
        },
        "type": "json"
      }
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "input": {
          "additionalProperties": false,
          "properties": {
            "body": {
              "additionalProperties": true,
              "properties": {
                "max_tokens": {
                  "description": "Maximum output tokens. Required for public x402 so the authorization has a hard ceiling.",
                  "type": "number"
                },
                "messages": {
                  "description": "Conversation messages. Each: { role: \"system\"|\"user\"|\"assistant\", content: \"text\" } or multimodal content arrays per the OpenAI format.",
                  "items": {
                    "additionalProperties": true,
                    "type": "object"
                  },
                  "type": "array"
                },
                "model": {
                  "description": "Provider-prefixed model ID (e.g. 'anthropic/claude-sonnet-4.6', 'anthropic/claude-haiku-4.5', 'openai/gpt-oss-120b', 'google/gemini-2.5-flash')",
                  "type": "string"
                },
                "temperature": {
                  "description": "Sampling temperature (0.0–2.0, default 1.0)",
                  "type": "number"
                }
              },
              "required": [
                "model",
                "messages",
                "max_tokens"
              ],
              "type": "object"
            },
            "bodyType": {
              "enum": [
                "json",
                "form-data",
                "text"
              ],
              "type": "string"
            },
            "method": {
              "enum": [
                "POST"
              ],
              "type": "string"
            },
            "type": {
              "const": "http",
              "type": "string"
            }
          },
          "required": [
            "type",
            "method",
            "bodyType",
            "body"
          ],
          "type": "object"
        },
        "output": {
          "properties": {
            "example": {
              "type": "object"
            },
            "type": {
              "type": "string"
            }
          },
          "required": [
            "type"
          ],
          "type": "object"
        }
      },
      "required": [
        "input"
      ],
      "type": "object"
    }
  },
  "eip2612GasSponsoring": {
    "info": {
      "description": "The facilitator accepts EIP-2612 gasless Permit to `Permit2` canonical contract.",
      "version": "1"
    },
    "schema": {
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "amount": {
          "description": "The amount to approve (uint256). Typically MaxUint.",
          "pattern": "^[0-9]+$",
          "type": "string"
        },
        "asset": {
          "description": "The address of the ERC-20 token contract.",
          "pattern": "^0x[a-fA-F0-9]{40}$",
          "type": "string"
        },
        "deadline": {
          "description": "The timestamp at which the signature expires.",
          "pattern": "^[0-9]+$",
          "type": "string"
        },
        "from": {
          "description": "The address of the sender.",
          "pattern": "^0x[a-fA-F0-9]{40}$",
          "type": "string"
        },
        "nonce": {
          "description": "The current nonce of the sender.",
          "pattern": "^[0-9]+$",
          "type": "string"
        },
        "signature": {
          "description": "The 65-byte concatenated signature (r, s, v) as a hex string.",
          "pattern": "^0x[a-fA-F0-9]+$",
          "type": "string"
        },
        "spender": {
          "description": "The address of the spender (Canonical Permit2).",
          "pattern": "^0x[a-fA-F0-9]{40}$",
          "type": "string"
        },
        "version": {
          "description": "Schema version identifier.",
          "pattern": "^[0-9]+(\\.[0-9]+)*$",
          "type": "string"
        }
      },
      "required": [
        "from",
        "asset",
        "spender",
        "amount",
        "nonce",
        "deadline",
        "signature",
        "version"
      ],
      "type": "object"
    }
  }
}

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

null

Examples

curl

curl "https://openrouter.x402.stage.paywithlocus.com/openrouter/chat"
# -> 402 Payment Required, accepts[] lists how to pay
# retry with a PAYMENT-SIGNATURE (or PAYMENT header) once paid

JavaScript

const res = await fetch("https://openrouter.x402.stage.paywithlocus.com/openrouter/chat");
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://openrouter.x402.stage.paywithlocus.com/openrouter/chat")
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: openrouter.x402.stage.paywithlocus.com
Endpoint: https://openrouter.x402.stage.paywithlocus.com/openrouter/chat
Machine-readable: /resources/13819.json