Paid call

The blob, as servednamed by its sha256

{
  "request": {
    "url": "https://api.onesource.io/api/chain/erc20-balance?account=0xd8da6bf26964af9d7eed9e03e53415d37aa96045&network=ethereum&token=0xdac17f958d2ee523a2206206994597c13d831ec7",
    "method": "GET",
    "input": {}
  },
  "unpaid": {
    "status": 402,
    "body": "{\"x402Version\":2,\"resource\":{\"url\":\"https://api.onesource.io/api/chain/erc20-balance?account=0xd8da6bf26964af9d7eed9e03e53415d37aa96045\\u0026network=ethereum\\u0026token=0xdac17f958d2ee523a2206206994597c13d831ec7\",\"description\":\"ERC20 token balance for any Ethereum wallet - USDC, USDT, DAI, or any token - via balanceOf (eth_call) on OneSource live Ethereum RPC\",\"mimeType\":\"application/json\"},\"accepts\":[{\"scheme\":\"exact\",\"network\":\"eip155:8453\",\"asset\":\"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913\",\"currency\":\"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913\",\"amount\":\"3000\",\"maxAmountRequired\":\"3000\",\"payTo\":\"0x52E29e0d2Aa49bfBfC548C0A9F2196F4aa51f3ea\",\"recipient\":\"0x52E29e0d2Aa49bfBfC548C0A9F2196F4aa51f3ea\",\"maxTimeoutSeconds\":3600,\"extra\":{\"credentialTypes\":[\"authorization\"],\"name\":\"USD Coin\",\"version\":\"2\"}},{\"scheme\":\"batch-settlement\",\"network\":\"eip155:8453\",\"asset\":\"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913\",\"currency\":\"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913\",\"amount\":\"3000\",\"maxAmountRequired\":\"3000\",\"payTo\":\"0x52E29e0d2Aa49bfBfC548C0A9F2196F4aa51f3ea\",\"recipient\":\"0x52E29e0d2Aa49bfBfC548C0A9F2196F4aa51f3ea\",\"maxTimeoutSeconds\":3600,\"extra\":{\"name\":\"USD Coin\",\"receiverAuthorizer\":\"0x11dF9F6280632aB8F12926b3f569E493EaEcf81b\",\"version\":\"2\",\"withdrawDelay\":86400}}],\"extensions\":{\"bazaar\":{\"info\":{\"input\":{\"method\":\"GET\",\"queryParams\":{\"address\":\"0xd8da6bf26964af9d7eed9e03e53415d37aa96045\",\"contract\":\"0xdac17f958d2ee523a2206206994597c13d831ec7\",\"network\":\"ethereum\"},\"type\":\"http\"},\"output\":{\"example\":{\"data\":{\"account\":\"0xd8da6bf26964af9d7eed9e03e53415d37aa96045\",\"balance\":\"1234567890\",\"contract_address\":\"0xdac17f958d2ee523a2206206994597c13d831ec7\",\"decimals\":6,\"name\":\"Tether USD\",\"symbol\":\"USDT\"},\"meta\":{\"cost_usdc\":\"0.001\",\"endpoint\":\"/api/chain/erc20-balance\",\"payment_chain\":\"base\",\"payment_token\":\"USDC\",\"request_id\":\"00000000abcdef01\"}},\"type\":\"json\"}},\"schema\":{\"$schema\":\"https://json-schema.org/draft/2020-12/schema\",\"properties\":{\"input\":{\"additionalProperties\":false,\"properties\":{\"method\":{\"enum\":[\"GET\",\"HEAD\",\"DELETE\"],\"type\":\"string\"},\"queryParams\":{\"properties\":{\"address\":{\"pattern\":\"^0x[a-fA-F0-9]{40}$\",\"type\":\"string\"},\"contract\":{\"pattern\":\"^0x[a-fA-F0-9]{40}$\",\"type\":\"string\"},\"network\":{\"default\":\"ethereum\",\"enum\":[\"ethereum\",\"sepolia\",\"robinhood\"],\"type\":\"string\"}},\"required\":[\"address\",\"contract\"],\"type\":\"object\"},\"type\":{\"const\":\"http\",\"type\":\"string\"}},\"required\":[\"type\",\"method\"],\"type\":\"object\"},\"output\":{\"properties\":{\"example\":{\"properties\":{\"data\":{\"description\":\"Endpoint-specific response payload\",\"properties\":{\"account\":{\"type\":\"string\"},\"balance\":{\"type\":\"string\"},\"contract_address\":{\"type\":\"string\"},\"decimals\":{\"type\":\"integer\"},\"name\":{\"type\":\"string\"},\"symbol\":{\"type\":\"string\"}},\"type\":\"object\"},\"error\":{\"properties\":{\"code\":{\"type\":\"integer\"},\"message\":{\"type\":\"string\"}},\"type\":[\"object\",\"null\"]},\"meta\":{\"properties\":{\"cost_usdc\":{\"type\":\"string\"},\"endpoint\":{\"type\":\"string\"},\"payment_chain\":{\"type\":\"string\"},\"payment_token\":{\"type\":\"string\"},\"request_id\":{\"type\":\"string\"}},\"required\":[\"endpoint\",\"request_id\"],\"type\":\"object\"}},\"required\":[\"data\",\"meta\"],\"type\":\"object\"},\"type\":{\"type\":\"string\"}},\"required\":[\"type\"],\"type\":\"object\"}},\"required\":[\"input\"],\"type\":\"object\"}}},\"error\":\"Payment required\",\"meta\":{\"cost_usdc\":\"0.003\",\"endpoint\":\"/api/chain/erc20-balance\",\"network\":\"eip155:8453\"},\"payment_rails\":[{\"assets\":[\"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913\"],\"chain\":\"eip155:8453\",\"rail\":\"x402\",\"recipient\":\"0x52E29e0d2Aa49bfBfC548C0A9F2196F4aa51f3ea\"},{\"assets\":[\"0x20c000000000000000000000b9537d11c60e8b50\",\"0x20c0000000000000000000000000000000000000\"],\"chain\":\"tempo:4217\",\"rail\":\"mpp\",\"recipient\":\"0x19B8e99079A5558ff4460357b0a78e14a7F600B7\"}],\"api_key_subscription\":{\"description\":\"Alternative to paying per call: a flat-rate monthly subscription authenticated with `Authorization: Bearer \\u003ckey\\u003e`. No wallet, stablecoin, or on-chain settlement required. Use this if the client cannot custody a private key, if billing must be invoiced, or if per-call pricing costs more than a flat fee at your volume.\",\"url\":\"https://onesource.io/rest-api#pricing\"}}\n"
  },
  "paid": {
    "status": 200,
    "headers": {
      "connection": "keep-alive",
      "content-length": "280",
      "content-type": "application/json",
      "date": "Tue, 01 Sep 2026 20:48:59 GMT",
      "payment-response": "eyJzdWNjZXNzIjp0cnVlLCJ0cmFuc2FjdGlvbiI6IjB4MDVjNzk5M2ViNmExNmZjODc3ZGQ1OWIwYjIwNTJlZDcyNTM2MTNhOGU1NmNjNDI4NGIwNDdhNzQ0MGRkZDE1ZiIsIm5ldHdvcmsiOiJlaXAxNTU6ODQ1MyJ9"
    },
    "body": "{\"data\":{\"account\":\"0xd8da6bf26964af9d7eed9e03e53415d37aa96045\",\"contract_address\":\"0xdac17f958d2ee523a2206206994597c13d831ec7\",\"balance\":\"290368219\",\"symbol\":\"USDT\",\"name\":\"Tether USD\",\"decimals\":6},\"meta\":{\"endpoint\":\"/api/chain/erc20-balance\",\"request_id\":\"9616824959eafae4\"}}\n"
  }
}

Verify it yourself

curl -s https://api.teppi.xyz/v1/evidence/sha256:9e541f546b2a440fe054839befbf53c07821ff87daf4b87cf291e73ba56043e0 | sha256sum

npx teppi-check https://api.onesource.io/api/chain/erc20-balance?account=0xd8da6bf26964af9d7eed9e03e53415d37aa96045&network=ethereum&token=0xdac17f958d2ee523a2206206994597c13d831ec7