API Acre
Resolve 29 common ERC-20, ERC-165, ERC-721, ERC-1155, ERC-2612, and ERC-3009 selectors without a network lookup, or strictly decode arbitrary Ethereum or EVM calldata using a supplied Solidity signature.
DataLiveeip155:8453Exactvia cdp
CryptoEvmEthereumSolidityCalldata
Calls · 30d
1↓ 42%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 30 snapshots so far.
$37.15
Verified settled volume
300 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0010
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 2026-09-01 12:52Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0xa0BFa4f07281c9b248DC3AED2217836BcA24869BThe 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.
0.001USDC≈ $0.001 USD
on Base · exact scheme
Pay 0.001 USDC on Base to 0xa0BF…4869B. The signed payment is good for 5 minutes.
- Paid to
- 0xa0BF…4869B
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 1000 smallest units
1000units
on solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp · exact scheme
That figure is in the token’s smallest units. Roundhouse does not hold this contract’s decimals, so it is shown as published rather than converted.
- Paid to
- B4CHWQ…HDLan
- Token contract
- EPjFWd…TDt1v
- Payment window
- 5 minutes
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xa0BFa4f07281c9b248DC3AED2217836BcA24869B",
"amount": "1000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
},
{
"asset": "EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v",
"extra": {
"feePayer": "GVJJ7rdGiXr5xaYbRwRbjfaJL7fmwRygFi1H6aGqDveb"
},
"payTo": "B4CHWQeQn7GDLZD2aW6hpGG2bEseisBFLZYECA3HDLan",
"amount": "1000",
"scheme": "exact",
"network": "solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"calldata": "0xa9059cbb0000000000000000000000001111111111111111111111111111111111111111000...",
"input_mode": "auto"
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"data": {
"types": [
"address",
"uint256"
],
"values": [
"0x1111111111111111111111111111111111111111",
42
],
"encoding": {
"canonical": true,
"argumentBytes": 64,
"calldataBytes": 68,
"calldataSha256": "f77b5da6ef3efa41f5084d653dc4a135a3978d541db97ce13225bd442b025198",
"argumentsSha256": "d3458da251349437abe3549042a49868dc5528422a63bb815f3e0b46725052c9"
},
"function": "transfer",
"selector": "0xa9059cbb",
"warnings": [
"Selector resolution is limited to 29 published standard signatures; four-byte..."
],
"arguments": [
{
"type": "address",
"index": 0,
"value": "0x1111111111111111111111111111111111111111"
}
],
"inputMode": "selector_and_arguments",
"signature": "transfer(address,uint256)",
"resolution": {
"method": "built_in_standard",
"candidates": [
"transfer(address,uint256)"
],
"candidateCount": 1,
"matchedStandards": [
"ERC-20"
],
"signatureProvided": false
},
"selectorPresent": true,
"signatureSource": "built_in_standard",
"canonicalSignature": "transfer(address,uint256)"
},
"meta": {
"cached": false,
"sources": [],
"warnings": [],
"duration_ms": 42,
"next_actions": []
},
"service": "crypto.calldata-decode",
"version": "1",
"request_id": "018f1f54-7f38-7ba2-8dc3-5f90272d9f1a"
}
}
},
"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": [
"calldata"
],
"properties": {
"calldata": {
"type": "string"
},
"input_mode": {
"enum": [
"auto",
"selector_and_arguments",
"arguments_only"
],
"type": "string"
},
"function_signature": {
"anyOf": [
{
"type": "string"
},
{
"type": "null"
}
]
}
}
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"POST",
"PUT",
"PATCH"
],
"type": "string"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"required": [
"request_id",
"service",
"version",
"data",
"meta"
],
"properties": {
"data": {
"type": "object",
"properties": {
"types": {
"type": "array",
"items": {
"type": "string"
}
},
"values": {
"type": "array",
"items": {}
},
"encoding": {
"type": "object"
},
"function": {
"type": "string"
},
"selector": {
"type": "string"
},
"warnings": {
"type": "array",
"items": {
"type": "string"
}
},
"arguments": {
"type": "array",
"items": {
"type": "object"
}
},
"inputMode": {
"type": "string"
},
"signature": {
"type": "string"
},
"resolution": {
"type": "object"
},
"selectorPresent": {
"type": "boolean"
},
"signatureSource": {
"type": "string"
},
"canonicalSignature": {
"type": "string"
}
}
},
"meta": {
"type": "object",
"required": [
"duration_ms",
"cached",
"sources",
"warnings",
"next_actions"
],
"properties": {
"cached": {
"type": "boolean"
},
"sources": {
"type": "array",
"items": {
"type": "string"
}
},
"warnings": {
"type": "array",
"items": {
"type": "string"
}
},
"duration_ms": {
"type": "integer"
},
"next_actions": {
"type": "array",
"items": {
"type": "object"
}
}
}
},
"service": {
"type": "string"
},
"version": {
"type": "string"
},
"request_id": {
"type": "string"
}
}
}
}
}
}
}
},
"payment-identifier": {
"info": {
"required": false
},
"schema": {
"type": "object",
"$schema": "https://json-schema.org/draft/2020-12/schema",
"required": [
"required"
],
"properties": {
"id": {
"type": "string",
"pattern": "^[a-zA-Z0-9_-]+$",
"maxLength": 128,
"minLength": 16
},
"required": {
"type": "boolean"
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-09-01 12:52Z
- Last indexed by Roundhouse
- 2026-09-24 08:50Z
- Last enriched (probe, favicon, geo)
- 2026-09-23 22:15Z
- x402 version
- 2
- Max timeout
- 300s
- Liveness probe
- HTTP 405
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. 30 snapshots so far. Verified volume counts only settlements with an on-chain EIP-3009 marker.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service API Acre 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%20Acre' 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://apiacre.com/v1/crypto/calldata-decode, 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.