similarity.openverbs.com

Recent payments · which agents last used it

Every indexed settlement paid to this service’s wallet, newest first. The index does not record which endpoint a payment was for, so if this wallet serves more than one endpoint, the rows include payments for the others. Paged up to the newest 5,000; the full history is on the merchant page.

Live 402 challenge

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

{
  "hint": "Use a supported wallet to pay for this resource using one of the supported payment methods returned in the WWW-Authenticate header. See https://mpp.dev/tools/wallet.md",
  "type": "https://paymentauth.org/problems/payment-required",
  "title": "Payment Required",
  "detail": "Payment is required (Encode a word with Double Metaphone, returning a primary and a secondary code to capture alternate pronunciations (useful for non-English names).).",
  "status": 402,
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "body": {
            "word": "example"
          },
          "type": "http",
          "bodyType": "json"
        }
      },
      "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": [
                  "word"
                ],
                "properties": {
                  "word": {
                    "type": "string",
                    "maxLength": 256,
                    "minLength": 1,
                    "description": "The word to encode."
                  }
                },
                "additionalProperties": false
              },
              "type": {
                "type": "string",
                "const": "http"
              },
              "method": {
                "enum": [
                  "POST",
                  "PUT",
                  "PATCH"
                ],
                "type": "string"
              },
              "bodyType": {
                "enum": [
                  "json",
                  "form-data",
                  "text"
                ],
                "type": "string"
              }
            },
            "additionalProperties": false
          }
        }
      }
    }
  },
  "challengeId": "umw0EXnC03RId2WCpBZG85klFYT9hUHuHH6CBUDfcI4"
}

Accepts

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

[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0xb3f4de103F34b99f0Da19B4F16D6B53a14C2194A",
    "scheme": "exact",
    "network": "eip155:8453",
    "mimeType": "application/json",
    "resource": "https://similarity.openverbs.com/v1/double-metaphone",
    "description": "",
    "maxAmountRequired": "2000",
    "maxTimeoutSeconds": 300
  }
]

Provenance

Seen in the source catalog

2026-10-05 15:15Z

Last indexed by Roundhouse

2026-10-31 17:15Z

Last enriched (probe, favicon, geo)

2026-09-27 10:15Z

x402 version

1

Max timeout

300s

Liveness probe

HTTP 402