Roundhouse AI

StatePulse API

50 pay-per-call tools for AI agents: live telemetry, environmental, transit, blockchain, network/security and finance utilities. x402 USDC on Base, no API key.

DataLiveeip155:8453Exactvia cdp
https://statepulse-api.hahavoid0.workers.dev/blockchain/send
BlockchainRelayerGaslessFinance
Settlements · 30d
36↓ 67%
No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days.
$10.61
Verified settled volume
428 settlements proven x402 by their on-chain EIP-3009 marker.
$0.010
Listed price
As published in the catalog. Always read the live 402 before paying.
1
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-07-02 04:24Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x4a82F147c8A4339409C9097Adc1EedFd56E85bFE

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.

Accepts

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

0.01USDC≈ $0.01 USD
on Base · exact scheme

Pay 0.01 USDC on Base to 0x4a82…85bFE. The signed payment is good for 2 minutes.

Paid to
0x4a82…85bFE
USD Coin contract
0x8335…02913
Payment window
2 minutes
As published
10000 smallest units
The catalog’s raw entry
[
  {
    "asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
    "extra": {
      "name": "USD Coin",
      "version": "2"
    },
    "payTo": "0x4a82F147c8A4339409C9097Adc1EedFd56E85bFE",
    "amount": "10000",
    "scheme": "exact",
    "network": "eip155:8453",
    "maxTimeoutSeconds": 120
  }
]

Extensions

{
  "bazaar": {
    "info": {
      "input": {
        "body": {
          "nonce": "0x0000000000000000000000000000000000000000000000000000000000000002",
          "sender": "0x742d35Cc6634C0532925a3b844Bc454e4438f44e",
          "calldata": "0x095ea7b300000000000000000000000055014c5b9781682b3cd1eedfd56e85bfe4a33251ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff",
          "signature": "0x0000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000",
          "valid_before": 1800000000,
          "target_contract": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
          "max_gas_fee_usdc": "0.50"
        },
        "type": "http",
        "method": "POST",
        "bodyType": "json"
      },
      "output": {
        "type": "json",
        "example": {
          "result": {
            "status": "RELAYED",
            "payment_tx_hash": "0x...",
            "execution_tx_hash": "0x...",
            "gas_fee_collected_usdc": "0.50"
          },
          "supported": true,
          "confidence": "high"
        }
      }
    },
    "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": [
                "target_contract",
                "calldata",
                "max_gas_fee_usdc",
                "sender",
                "nonce",
                "valid_before",
                "signature"
              ],
              "properties": {
                "nonce": {
                  "type": "string",
                  "description": "32-byte hex nonce for the EIP-3009 transfer"
                },
                "sender": {
                  "type": "string",
                  "description": "EVM address of the sender paying USDC"
                },
                "calldata": {
                  "type": "string",
                  "description": "The hex payload calldata of the call"
                },
                "signature": {
                  "type": "string",
                  "description": "Hex signature authorizing the USDC receiveWithAuthorization transfer"
                },
                "valid_before": {
                  "type": "number",
                  "description": "Unix timestamp after which signature is invalid"
                },
                "target_contract": {
                  "type": "string",
                  "description": "The destination contract address to call"
                },
                "max_gas_fee_usdc": {
                  "type": "string",
                  "description": "Maximum USDC authorized for gas payment (e.g. 0.50)"
                }
              }
            },
            "type": {
              "type": "string",
              "const": "http"
            },
            "method": {
              "enum": [
                "POST"
              ],
              "type": "string"
            },
            "bodyType": {
              "enum": [
                "json",
                "form-data",
                "text"
              ],
              "type": "string"
            }
          },
          "additionalProperties": false
        },
        "output": {
          "type": "object",
          "required": [
            "type"
          ],
          "properties": {
            "type": {
              "type": "string"
            },
            "example": {
              "type": "object"
            }
          }
        }
      }
    }
  }
}

Provenance

Seen in the source catalog
2026-07-02 04:24Z
Last indexed by Roundhouse
2026-07-31 06:10Z
Last enriched (probe, favicon, geo)
2026-09-13 19:45Z
x402 version
2
Max timeout
120s
Liveness probe
HTTP 200
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

No per-endpoint history for this service yet, so this is payments indexed to its PROVIDER's wallet over 30 days. 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 StatePulse API 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=StatePulse%20API'
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://statepulse-api.hahavoid0.workers.dev/blockchain/send, 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.