Roundhouse AI

api.onesource.io

Fetches ERC20 transfer logs for a given network, token contract, and wallet address. Useful for checking token movement history and transfer counts on-chain.

OtherLiveeip155:8453Exactvia facilitator:dexter
https://api.onesource.io/api/chain/erc20-transfers
Calls · 30d
732↑ 4.7%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 32 snapshots so far.
$20.97
Verified settled volume
A floor: summed over 5,000 of up to 90,636 indexed settlements. The exact verified count is not computed for a wallet this size.
$0.0050
Listed price
As published in the catalog. Always read the live 402 before paying.
—
Calls · 30d
Upstream's own call count for this endpoint, not ours.
—
Unique payers · 30d
Never called
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x52E29e0d2Aa49bfBfC548C0A9F2196F4aa51f3ea

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.

Live 402 challenge

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

{
  "meta": {
    "network": "eip155:8453",
    "endpoint": "/api/chain/erc20-transfers",
    "cost_usdc": "0.005"
  },
  "error": "Payment required",
  "accepts": [
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2",
        "credentialTypes": [
          "authorization"
        ]
      },
      "payTo": "0x52E29e0d2Aa49bfBfC548C0A9F2196F4aa51f3ea",
      "amount": "5000",
      "scheme": "exact",
      "network": "eip155:8453",
      "currency": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "recipient": "0x52E29e0d2Aa49bfBfC548C0A9F2196F4aa51f3ea",
      "maxAmountRequired": "5000",
      "maxTimeoutSeconds": 3600
    },
    {
      "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "extra": {
        "name": "USD Coin",
        "version": "2",
        "withdrawDelay": 86400,
        "receiverAuthorizer": "0x11dF9F6280632aB8F12926b3f569E493EaEcf81b"
      },
      "payTo": "0x52E29e0d2Aa49bfBfC548C0A9F2196F4aa51f3ea",
      "amount": "5000",
      "scheme": "batch-settlement",
      "network": "eip155:8453",
      "currency": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
      "recipient": "0x52E29e0d2Aa49bfBfC548C0A9F2196F4aa51f3ea",
      "maxAmountRequired": "5000",
      "maxTimeoutSeconds": 3600
    }
  ],
  "resource": {
    "url": "https://api.onesource.io/api/chain/erc20-transfers",
    "mimeType": "application/json",
    "description": "ERC20 Transfer logs via eth_getLogs - raw Transfer events for a token or wallet"
  },
  "extensions": {
    "bazaar": {
      "info": {
        "input": {
          "type": "http",
          "method": "GET",
          "queryParams": {
            "address": "0xd8da6bf26964af9d7eed9e03e53415d37aa96045",
            "network": "ethereum",
            "contract": "0xdac17f958d2ee523a2206206994597c13d831ec7"
          }
        },
        "output": {
          "type": "json",
          "example": {
            "data": {
              "logs": [
                {
                  "data": "0x00000000000000000000000000000000000000000000000000000000000f4240",
                  "topics": [
                    "0xddf252ad1be2c89b69c2b068fc378daa952ba7f163c4a11628f55a4df523b3ef",
                    "0x000000000000000000000000d8da6bf26964af9d7eed9e03e53415d37aa96045",
                    "0x0000000000000000000000006b175474e89094c44da98b954eedeac495271d0f"
                  ],
                  "address": "0xdac17f958d2ee523a2206206994597c13d831ec7",
                  "logIndex": "0x0",
                  "blockNumber": "0x133da1e",
                  "transactionHash": "0xad7e04119ecd85857728205f5b12e95f0bab8e99f9c2f60be5dc79cfc6a8df1f"
                }
              ],
              "count": 1,
              "to_block": "latest",
              "from_block": "latest"
            },
            "meta": {
              "endpoint": "/api/chain/erc20-transfers",
              "cost_usdc": "0.001",
              "request_id": "00000000abcdef01",
              "payment_chain": "base",
              "payment_token": "USDC"
            }
          }
        }
      },
      "schema": {
        "type": "object",
        "$schema": "https://json-schema.org/draft/2020-12/schema",
        "required": [
          "input"
        ],
        "properties": {
          "input": {
            "type": "object",
            "required": [
              "type",
              "method"
            ],
            "properties": {
              "type": {
                "type": "string",
                "const": "http"
              },
              "method": {
                "enum": [
                  "GET",
                  "HEAD",
                  "DELETE"
                ],
                "type": "string"
              },
              "queryParams": {
                "type": "object",
                "properties": {
                  "address": {
                    "type": "string",
                    "pattern": "^0x[a-fA-F0-9]{40}$"
                  },
                  "network": {
                    "enum": [
                      "ethereum",
                      "sepolia",
                      "robinhood"
                    ],
                    "type": "string",
                    "default": "ethereum"
                  },
                  "contract": {
                    "type": "string",
                    "pattern": "^0x[a-fA-F0-9]{40}$"
                  },
                  "to_block": {
                    "oneOf": [
                      {
                        "type": "integer",
                        "minimum": 0
                      },
                      {
                        "enum": [
                          "latest",
                          "pending",
                          "earliest",
                          "safe",
                          "finalized"
                        ],
                        "type": "string"
                      },
                      {
                        "type": "string",
                        "pattern": "^0[xX][a-fA-F0-9]+$"
                      }
                    ]
                  },
                  "from_block": {
                    "oneOf": [
                      {
                        "type": "integer",
                        "minimum": 0
                      },
                      {
                        "enum": [
                          "latest",
                          "pending",
                          "earliest",
                          "safe",
                          "finalized"
                        ],
                        "type": "string"
                      },
                      {
                        "type": "string",
                        "pattern": "^0[xX][a-fA-F0-9]+$"
                      }
                    ]
                  }
                }
              }
            },
            "additionalProperties": false
          },
          "output": {
            "type": "object",
            "required": [
              "type"
            ],
            "properties": {
              "type": {
                "type": "string"
              },
              "example": {
                "type": "object",
                "required": [
                  "data",
                  "meta"
                ],
                "properties": {
                  "data": {
                    "type": "object",
                    "properties": {
                      "logs": {
                        "type": "array",
                        "items": {
                          "type": "object",
                          "properties": {
                            "data": {
                              "type": "string"
                            },
                            "topics": {
                              "type": "array",
                              "items": {
                                "type": "string"
                              }
                            },
                            "address": {
                              "type": "string"
                            },
                            "logIndex": {
                              "type": "string"
                            },
                            "blockNumber": {
                              "type": "string"
                            },
                            "transactionHash": {
                              "type": "string"
                            }
                          }
                        }
                      },
                      "count": {
                        "type": "integer"
                      },
                      "to_block": {
                        "type": "string"
                      },
                      "from_block": {
                        "type": "string"
                      }
                    },
                    "description": "Endpoint-specific response payload"
                  },
                  "meta": {
                    "type": "object",
                    "required": [
                      "endpoint",
                      "request_id"
                    ],
                    "properties": {
                      "endpoint": {
                        "type": "string"
                      },
                      "cost_usdc": {
                        "type": "string"
                      },
                      "request_id": {
                        "type": "string"
                      },
                      "payment_chain": {
                        "type": "string"
                      },
                      "payment_token": {
                        "type": "string"
                      }
                    }
                  },
                  "error": {
                    "type": [
                      "object",
                      "null"
                    ],
                    "properties": {
                      "code": {
                        "type": "integer"
                      },
                      "message": {
                        "type": "string"
                      }
                    }
                  }
                }
              }
            }
          }
        }
      }
    }
  },
  "x402Version": 2,
  "payment_rails": [
    {
      "rail": "x402",
      "chain": "eip155:8453",
      "assets": [
        "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"
      ],
      "recipient": "0x52E29e0d2Aa49bfBfC548C0A9F2196F4aa51f3ea"
    },
    {
      "rail": "mpp",
      "chain": "tempo:4217",
      "assets": [
        "0x20c000000000000000000000b9537d11c60e8b50",
        "0x20c0000000000000000000000000000000000000"
      ],
      "recipient": "0x19B8e99079A5558ff4460357b0a78e14a7F600B7"
    }
  ],
  "api_key_subscription": {
    "url": "https://onesource.io/rest-api#pricing",
    "description": "Alternative to paying per call: a flat-rate monthly subscription authenticated with `Authorization: Bearer <key>`. 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."
  }
}

Accepts

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

0.005USDC≈ $0.005 USD
on Base · exact scheme

Pay 0.005 USDC on Base to 0x52E2…1f3ea. The signed payment is good for 1 hour.

Paid to
0x52E2…1f3ea
USD Coin contract
0x8335…02913
Payment window
1 hour
As published
5000 smallest units
0.005USDC≈ $0.005 USD
on Base · batch-settlement scheme

Pay 0.005 USDC on Base to 0x52E2…1f3ea. The signed payment is good for 1 hour.

Paid to
0x52E2…1f3ea
USD Coin contract
0x8335…02913
Payment window
1 hour
As published
5000 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2",
      "credentialTypes": [
        "authorization"
      ]
    },
    "payTo": "0x52E29e0d2Aa49bfBfC548C0A9F2196F4aa51f3ea",
    "amount": "5000",
    "scheme": "exact",
    "network": "eip155:8453",
    "currency": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "resource": "https://api.onesource.io/api/chain/erc20-transfers",
    "recipient": "0x52E29e0d2Aa49bfBfC548C0A9F2196F4aa51f3ea",
    "maxAmountRequired": "5000",
    "maxTimeoutSeconds": 3600
  },
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2",
      "withdrawDelay": 86400,
      "receiverAuthorizer": "0x11dF9F6280632aB8F12926b3f569E493EaEcf81b"
    },
    "payTo": "0x52E29e0d2Aa49bfBfC548C0A9F2196F4aa51f3ea",
    "amount": "5000",
    "scheme": "batch-settlement",
    "network": "eip155:8453",
    "currency": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "resource": "https://api.onesource.io/api/chain/erc20-transfers",
    "recipient": "0x52E29e0d2Aa49bfBfC548C0A9F2196F4aa51f3ea",
    "maxAmountRequired": "5000",
    "maxTimeoutSeconds": 3600
  }
]

Provenance

Seen in the source catalog
2026-09-23 18:58Z
Last indexed by Roundhouse
2026-09-24 13:15Z
Last enriched (probe, favicon, geo)
2026-09-17 15:15Z
x402 version
2
Max timeout
3600s
Liveness probe
HTTP 402
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 api.onesource.io 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=api.onesource.io'
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.onesource.io/api/chain/erc20-transfers, 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. Mint a personal key for $0.01 at GET https://api.roundhouseai.io/v0/test/x402,
or use an organization key from https://roundhouseai.io/dashboard/team.

If you do not have Roundhouse tools or skills installed, read
https://roundhouseai.io/skill.md first — it is the whole procedure.