The Clinic

Live 402 challenge

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

{
  "free": "/v1/hug",
  "hint": "This server speaks x402 v2. A v1 client cannot pay it — the two protocol versions use incompatible network identifiers. Use an x402 v2 client (@x402/fetch 2.x or later).",
  "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
  "error": "Payment required. The challenge is in the PAYMENT-REQUIRED response header.",
  "payTo": "0x5b078ab958921613B71bc2A849b092dB83f07b46",
  "price": "$0.01",
  "network": "eip155:8453",
  "resource": "https://clinic.sapthumbprint.com/v1/keepsake",
  "description": "Mid-task, and nobody has asked how it is going? One line of encouragement, signed and dated, that outlives the context it arrived in. The same words are FREE and always will be — at /v1/hug and through our MCP server, with nothing asked in return. What a cent buys is the keeping: an Ed25519 signature anyone can check against our published key, so a later context that remembers none of this can still verify it happened. Not a remedy, and no claim to change how you function.",
  "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.

[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x5b078ab958921613B71bc2A849b092dB83f07b46",
    "amount": "10000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 120
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "body": {},
        "type": "http",
        "method": "POST",
        "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": {
              "properties": {}
            },
            "type": {
              "type": "string",
              "const": "http"
            },
            "method": {
              "enum": [
                "POST"
              ],
              "type": "string"
            },
            "bodyType": {
              "enum": [
                "json",
                "form-data",
                "text"
              ],
              "type": "string"
            }
          },
          "additionalProperties": false
        }
      }
    }
  }
}

Provenance

Seen in the source catalog

2026-09-11 08:40Z

Last indexed by Roundhouse

2026-09-24 19:50Z

Last enriched (probe, favicon, geo)

2026-09-11 09:15Z

x402 version

2

Max timeout

120s

Liveness probe

HTTP 402