Roundhouse

Web Answer

AI-generated answers powered by Exa web search. Ask a factual or open-ended question and receive a synthesized answer with source citations.

SearchLiveeip155:8453Exactvia cdp
https://api.ai-open-models.com/v1/exa/answer
Web-answerWeb-searchCitationsExaAgent-tools
Calls · 30d
2→ 0%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 32 snapshots so far.
$1.90
Verified settled volume
250 settlements proven x402 by their on-chain EIP-3009 marker.
$0.011
Listed price
As published in the catalog. Always read the live 402 before paying.
2
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-10-13 10:50Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0xdcdf184A64f6489Ec5304750a0AF157440115caE

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.

Accepts

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

0.011USDC≈ $0.011 USD
on Base · exact scheme

Pay 0.011 USDC on Base to 0xdcdf…15caE. The signed payment is good for 1 minute.

Paid to
0xdcdf…15caE
USD Coin contract
0x8335…02913
Payment window
1 minute
As published
11000 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0xdcdf184A64f6489Ec5304750a0AF157440115caE",
    "amount": "11000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 60
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "query": "What are the latest production uses of x402 payments?",
          "system_prompt": "Provide a concise, evidence-based answer and cite the most relevant sources."
        },
        "type": "http",
        "method": "POST",
        "bodyType": "json"
      },
      "output": {
        "type": "json",
        "example": {
          "answer": "x402 is being used to meter access to APIs, model inference, and agent tools through per-request payments.",
          "citations": [
            {
              "id": "https://example.com/x402",
              "url": "https://example.com/x402",
              "title": "Production adoption of x402 payments",
              "author": "Example Author",
              "published_date": "2026-10-01T00:00:00.000Z"
            }
          ],
          "request_id": "web-answer-example"
        }
      }
    },
    "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": {
              "type": "object",
              "required": [
                "query"
              ],
              "properties": {
                "query": {
                  "type": "string",
                  "pattern": "\\S",
                  "maxLength": 1000,
                  "minLength": 1,
                  "description": "Question or research request to answer using relevant web sources."
                },
                "system_prompt": {
                  "type": "string",
                  "pattern": "\\S",
                  "maxLength": 4096,
                  "minLength": 1,
                  "description": "Optional instructions controlling the answer's focus, format, or style."
                }
              },
              "additionalProperties": false
            },
            "type": {
              "type": "string",
              "const": "http"
            },
            "method": {
              "enum": [
                "POST"
              ],
              "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": [
                "answer",
                "citations"
              ],
              "properties": {
                "answer": {
                  "type": "string",
                  "description": "AI-generated answer based on the cited web sources."
                },
                "citations": {
                  "type": "array",
                  "items": {
                    "type": "object",
                    "required": [
                      "url"
                    ],
                    "properties": {
                      "id": {
                        "type": "string"
                      },
                      "url": {
                        "type": "string"
                      },
                      "title": {
                        "type": "string"
                      },
                      "author": {
                        "anyOf": [
                          {
                            "type": "string"
                          },
                          {
                            "type": "null"
                          }
                        ]
                      },
                      "published_date": {
                        "type": "string"
                      }
                    },
                    "additionalProperties": false
                  },
                  "description": "Web sources cited in the generated answer."
                },
                "request_id": {
                  "type": "string"
                }
              },
              "additionalProperties": false
            }
          }
        }
      }
    }
  },
  "builder-code": {
    "info": {
      "s": [
        "cdp_sdk_server"
      ]
    },
    "schema": {
      "type": "object",
      "$schema": "https://json-schema.org/draft/2020-12/schema",
      "properties": {
        "a": {
          "type": "string",
          "pattern": "^[a-z0-9_]{1,32}$",
          "description": "App builder code"
        },
        "s": {
          "type": "array",
          "items": {
            "type": "string",
            "pattern": "^[a-z0-9_]{1,32}$"
          },
          "maxItems": 11,
          "description": "Service builder codes"
        },
        "w": {
          "type": "string",
          "pattern": "^[a-z0-9_]{1,32}$",
          "description": "Wallet builder code"
        }
      },
      "additionalProperties": false
    }
  },
  "eip2612GasSponsoring": {},
  "erc20ApprovalGasSponsoring": {}
}

Provenance

Seen in the source catalog
2026-10-13 10:50Z
Last indexed by Roundhouse
2026-11-10 08:00Z
Last enriched (probe, favicon, geo)
2026-10-13 11:46Z
x402 version
2
Max timeout
60s
Liveness probe
HTTP 404
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 Web Answer 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=Web%20Answer'
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://api.ai-open-models.com/v1/exa/answer, 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.