{
  "x402Version": 2,
  "id": 939,
  "slug": "939",
  "resource": "https://api.hergertsynthora.com/v1/sentiment",
  "description": "Real-time crowd sentiment oracle for any topic or asset: GDELT global-news tone timeline -> sentiment (very_bullish..very_bearish), tone score, trend and trading signal, with top headlines. POST {\"query\":\"bitcoin\",\"timespan\":\"6h\"}. Deterministic, Ed25519-signed. SYNTHORA.",
  "type": "http",
  "accepts": [
    {
      "scheme": "exact",
      "network": "eip155:8453",
      "payTo": "0x6D9F318463168fF637b50E5b9a21392e97c7c167",
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "amount": "5000",
      "maxTimeoutSeconds": 300
    }
  ],
  "outputSchema": {
    "bazaar": {
      "info": {
        "input": {
          "body": {
            "query": "bitcoin",
            "timespan": "6h"
          },
          "bodyType": "json",
          "method": "POST",
          "type": "http"
        },
        "output": {
          "example": {
            "niche": "sentiment",
            "ok": true,
            "result": {
              "headlines": [],
              "query": "bitcoin",
              "sentiment": "neutral",
              "signal": "neutral",
              "tone_score": 0,
              "tone_trend": "stable"
            }
          },
          "type": "json"
        }
      },
      "schema": {
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "properties": {
          "input": {
            "additionalProperties": false,
            "properties": {
              "body": {
                "properties": {
                  "query": {
                    "description": "Topic or asset, e.g. bitcoin",
                    "type": "string"
                  },
                  "timespan": {
                    "default": "6h",
                    "enum": [
                      "1h",
                      "6h",
                      "12h",
                      "24h",
                      "48h",
                      "72h"
                    ],
                    "type": "string"
                  }
                },
                "required": [
                  "query"
                ],
                "type": "object"
              },
              "bodyType": {
                "enum": [
                  "json",
                  "form-data",
                  "text"
                ],
                "type": "string"
              },
              "method": {
                "enum": [
                  "POST",
                  "PUT",
                  "PATCH"
                ],
                "type": "string"
              },
              "type": {
                "const": "http",
                "type": "string"
              }
            },
            "required": [
              "type",
              "method",
              "bodyType",
              "body"
            ],
            "type": "object"
          },
          "output": {
            "properties": {
              "example": {
                "niche": {
                  "type": "string"
                },
                "ok": {
                  "type": "boolean"
                },
                "type": "object"
              },
              "type": {
                "type": "string"
              }
            },
            "required": [
              "type"
            ],
            "type": "object"
          }
        },
        "required": [
          "input"
        ],
        "type": "object"
      }
    },
    "delivery": {
      "behaviour": "if the service FAILS (invalid input, timeout, stale cache, withdrawn product, malformed output) you receive 402 and are NOT charged",
      "note": "unlike the signature -- which you verify BEFORE paying -- this one is checked afterwards, on-chain, from your own wallet",
      "order": "compute -> failure gate -> verify -> settle -> deliver",
      "policy": "no-charge-on-service-failure",
      "scope": "this covers service FAILURE, not verdict quality",
      "verify": "after a request of yours FAILS, check your own wallet on Base: no USDC settlement to our payTo will exist for it. If we had charged you, the transfer would be public and permanent"
    },
    "signature": {
      "alg": "ed25519",
      "canon": "json:sort_keys+separators(,:)+ensure_ascii+utf8",
      "envelope": "{result, attestation:{alg,pubkey,sig,canon}}",
      "jwksUrl": "https://api.hergertsynthora.com/.well-known/jwks.json",
      "publicKeyUrl": "https://api.hergertsynthora.com/pubkey",
      "sigEncoding": "hex(64B raw)",
      "verify": "recompute canon from envelope.result, then VerifyKey(bytes.fromhex(pubkey)).verify(canon, bytes.fromhex(sig)) -- no name to trust, verify the signature yourself"
    }
  },
  "tags": [
    "bazaar",
    "delivery",
    "signature"
  ],
  "sourceHost": "api.hergertsynthora.com",
  "lastUpdated": "2026-08-26T06:26:36.65Z",
  "quality": {
    "calls30d": 1,
    "uniquePayers30d": 1,
    "lastCalledAt": "2026-08-26T06:26:36.097Z"
  },
  "liveness": {},
  "verified": false,
  "featured": false,
  "provider": {
    "host": "api.hergertsynthora.com",
    "manifest_name": "api.hergertsynthora.com",
    "source": "cdp-mirror",
    "source_manifest_url": "https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources",
    "submitted_at": "2026-09-18T22:00:31.484Z"
  }
}