x402.agentindex.world

Name: x402.agentindex.world
Price: 0.001892 USDC
Availability: InStock

No description published for this endpoint.

InferenceLiveeip155:8453Exactvia facilitator:thirdweb

https://x402.agentindex.world/llm/claude-sonnet

Calls · 30d

3→ 0%

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 32 snapshots so far.

$1.51

Verified settled volume

563 settlements proven x402 by their on-chain EIP-3009 marker.

$0.0019

Listed price

As published in the catalog. Always read the live 402 before paying.

—

Calls · 30d

Upstream's own call count for this endpoint, not ours.

—

Unique payers · 30d

Never called

—

Upstream on-chain volume

Reported by the source catalog.

Paid to

0xb3F32bdfe8D07825BC0D7387295aB1D7559BA69d

The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.

Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913

Provider

The payTo wallet does not resolve to a registered ERC-8004 agent. That is not a verdict on the service — most of the catalog is unregistered.

Live 402 challenge

Captured by the enrichment pass, not read just now. Prices can change — always read the 402 the endpoint answers with.

{
  "error": "Payment required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2"
      },
      "payTo": "0xb3F32bdfe8D07825BC0D7387295aB1D7559BA69d",
      "amount": "11264",
      "scheme": "exact",
      "network": "eip155:8453",
      "maxTimeoutSeconds": 300
    }
  ],
  "resource": {
    "url": "https://x402.agentindex.world/llm/claude-sonnet",
    "tags": [
      "Claude Sonnet API",
      "claude api",
      "anthropic api",
      "pay per call llm"
    ],
    "iconUrl": "https://x402.agentindex.world/icon.png",
    "mimeType": "application/json",
    "description": "Claude Sonnet API - pay per call, no API key. OpenAI-format chat completions on anthropic/claude-sonnet-5.5, pinned to Anthropic's own OpenRouter endpoint for reliability. You sign a fixed price computed from your max_tokens; unused tokens are not refunded. 20s server-side timeout - never charged if it fires; set your client timeout to 30s. Try GET /llm/claude-sonnet/sample.",
    "serviceName": "claude-sonnet-api"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "body": {
            "messages": [
              {
                "role": "user",
                "content": "Summarize in one sentence: The Eiffel Tower is a wrought-iron lattice tower on the Champ de Mars in Paris, France. It was designed by Gustave Eiffel's engineering company and built as the entrance arch for the 1889 World's Fair. Initially criticized by some of France's leading artists and intellectuals for its design, it has become a global cultural icon of France and one of the most recognizable structures in the world, attracting millions of visitors every year."
              }
            ],
            "max_tokens": 150
          },
          "type": "http",
          "method": "GET",
          "bodyType": "json"
        },
        "output": {
          "type": "json",
          "example": {
            "id": "gen-1790780999-5D8mNBe2jJJ4gO8UyUsm",
            "model": "anthropic/claude-sonnet-5.5",
            "usage": {
              "cost": 0.00132,
              "total_tokens": 260,
              "prompt_tokens": 160,
              "completion_tokens": 100
            },
            "object": "chat.completion",
            "choices": [
              {
                "index": 0,
                "message": {
                  "role": "assistant",
                  "content": "The Eiffel Tower, a wrought-iron lattice tower in Paris designed by Gustave Eiffel's company for the 1889 World's Fair, was initially criticized by prominent French artists and intellectuals but has since become a globally recognized cultural icon that draws millions of visitors annually."
                },
                "finish_reason": "stop"
              }
            ],
            "created": 1790780999,
            "provider": "Anthropic",
            "x402_receipt": {
              "upstream": "llm/claude-sonnet",
              "latency_ms": 1700,
              "model_served": "anthropic/claude-sonnet-5.5",
              "price_paid_usdc": 0.001892
            }
          }
        }
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "required": [
          "input"
        ],
        "properties": {
          "input": {
            "type": "object",
            "required": [
              "type",
              "method",
              "bodyType",
              "body"
            ],
            "properties": {
              "body": {
                "required": [
                  "messages"
                ],
                "properties": {
                  "messages": {
                    "type": "array",
                    "items": {
                      "type": "object"
                    },
                    "minItems": 1,
                    "description": "OpenAI-format chat messages: [{role, content}, ...]."
                  },
                  "max_tokens": {
                    "type": "integer",
                    "description": "Max completion tokens, capped at 4096 - also bounds the price ceiling."
                  }
                }
              },
              "type": {
                "type": "string",
                "const": "http"
              },
              "method": {
                "enum": [
                  "POST",
                  "PUT",
                  "PATCH"
                ],
                "type": "string"
              },
              "bodyType": {
                "enum": [
                  "json",
                  "form-data",
                  "text"
                ],
                "type": "string"
              }
            },
            "additionalProperties": false
          },
          "output": {
            "type": "object",
            "required": [
              "type"
            ],
            "properties": {
              "type": {
                "type": "string"
              },
              "example": {
                "type": "object",
                "required": [
                  "choices",
                  "usage"
                ],
                "properties": {
                  "id": {
                    "type": "string"
                  },
                  "model": {
                    "type": "string"
                  },
                  "usage": {
                    "type": "object"
                  },
                  "choices": {
                    "type": "array",
                    "items": {
                      "type": "object"
                    }
                  },
                  "x402_receipt": {
                    "type": "object"
                  }
                }
              }
            }
          }
        }
      }
    }
  },
  "x402Version": 2
}

Accepts

The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.

0.001892USDC≈ $0.001892 USD

on Base · exact scheme

Pay 0.001892 USDC on Base to 0xb3F3…BA69d. The signed payment is good for 5 minutes.

Paid to: 0xb3F3…BA69d
USD Coin contract: 0x8335…02913
Payment window: 5 minutes
As published: 1892 smallest units
Returns: application/json

The catalog’s raw entry

[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0xb3F32bdfe8D07825BC0D7387295aB1D7559BA69d",
    "scheme": "exact",
    "network": "eip155:8453",
    "mimeType": "application/json",
    "resource": "https://x402.agentindex.world/llm/claude-sonnet",
    "description": "",
    "maxAmountRequired": "1892",
    "maxTimeoutSeconds": 300
  }
]

Provenance

Seen in the source catalog: 2026-10-08 06:08Z
Last indexed by Roundhouse: 2026-10-26 02:46Z
Last enriched (probe, favicon, geo): 2026-10-02 18:45Z
x402 version: 1
Max timeout: 300s
Liveness probe: HTTP 402

Report

Hand this page to an agent

Copy the prompt and paste it into Claude, an MCP client or your own agent — it will vet this service and call it over the free read API. No key, no account.

GET api.roundhouseai.io/v0/endpoints

This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 32 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.

Open skill.md

Show the prompt

Using Roundhouse, look up the x402 service x402.agentindex.world and tell me whether it is
worth paying: what a call costs, whether the endpoint answered when last probed, and what
its payment record actually shows.

curl -s 'https://api.roundhouseai.io/v0/endpoints?q=x402.agentindex.world'
curl -s 'https://api.roundhouseai.io/v0/merchants/<the payTo wallet returned above>'

Then call it: read the price from the live 402 at https://x402.agentindex.world/llm/claude-sonnet, never from
a cached figure, and pay with an x402 client.

The /v0 API needs an API key (`authorization: Bearer rh_live_…`) on everything except
/v0/unified* and /v0/endpoints. Either pay over x402 (mint a personal key for $0.01 at
GET https://api.roundhouseai.io/v0/test/x402), or ask me for an organization key, which I create at
https://roundhouseai.io/dashboard/connections. If you have neither, ask before going further.

If you do not have Roundhouse tools or skills installed, read
https://roundhouseai.io/skill.md first — it is the whole procedure.