EVM & Solana Utility Tools
x402 Atlas provides real-time x402 analytics for autonomous APIs on Base. Track transactions, discover trends, and analyze the x402 ecosystem.
SearchLiveeip155:8453Exactvia cdp
Abi-encodeSolidity-abiEvmBlockchain-developmentOffline-computation
Calls · 30d
2↑ 7.7%
This endpoint's own trailing-30-day call count, as published by the upstream catalog and snapshotted daily. 30 snapshots so far.
$24.55
Verified settled volume
1,041 settlements proven x402 by their on-chain EIP-3009 marker.
$0.0050
Listed price
As published in the catalog. Always read the live 402 before paying.
2
Calls · 30d
Upstream's own call count for this endpoint, not ours.
1
Unique payers · 30d
Last called 2026-09-15 06:32Z
—
Upstream on-chain volume
Reported by the source catalog.
Paid to
0x8C128f1Ee62Bb5e47867CfbAe2ad89be325Df1b2The 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.
0.005USDC≈ $0.005 USD
on Base · exact scheme
Pay 0.005 USDC on Base to 0x8C12…Df1b2. The signed payment is good for 5 minutes.
- Paid to
- 0x8C12…Df1b2
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 5000 smallest units
5000units
on Polygon · 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
- 0x8C12…Df1b2
- Token contract
- 0x3c49…c3359
- Payment window
- 5 minutes
5000units
on Arbitrum · 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
- 0x8C12…Df1b2
- Token contract
- 0xaf88…e5831
- Payment window
- 5 minutes
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"tier": "standard",
"version": "2",
"merchant": "x402Atlas"
},
"payTo": "0x8C128f1Ee62Bb5e47867CfbAe2ad89be325Df1b2",
"amount": "5000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
},
{
"asset": "0x3c499c542cEF5E3811e1192ce70d8cC03d5c3359",
"extra": {
"name": "USD Coin",
"tier": "standard",
"version": "2",
"merchant": "x402Atlas"
},
"payTo": "0x8C128f1Ee62Bb5e47867CfbAe2ad89be325Df1b2",
"amount": "5000",
"scheme": "exact",
"network": "eip155:137",
"maxTimeoutSeconds": 300
},
{
"asset": "0xaf88d065e77c8cC2239327C5EDb3A432268e5831",
"extra": {
"name": "USD Coin",
"tier": "standard",
"version": "2",
"merchant": "x402Atlas"
},
"payTo": "0x8C128f1Ee62Bb5e47867CfbAe2ad89be325Df1b2",
"amount": "5000",
"scheme": "exact",
"network": "eip155:42161",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"body": {
"types": [
"address",
"uint256"
],
"values": [
"0x0000000000000000000000000000000000000001",
"1000"
],
"function": "transfer",
"include_selector": true
},
"type": "http",
"method": "POST",
"bodyType": "json"
},
"output": {
"type": "json",
"example": {
"data": "0xa9059cbb000000000000000000000000000000000000000000000000000000000000000100000000000000000000000000000000000000000000000000000000000003e8",
"types": [
"address",
"uint256"
],
"values": [
"0x0000000000000000000000000000000000000001",
"1000"
],
"payload": "0x000000000000000000000000000000000000000000000000000000000000000100000000000000000000000000000000000000000000000000000000000003e8",
"selector": "0xa9059cbb",
"warnings": [],
"operation": "abi-encode",
"include_selector": true,
"algorithm_version": "solidity-abi-v1",
"function_signature": "transfer(address,uint256)"
}
}
},
"tags": [
"abi-encode",
"solidity-abi",
"evm",
"blockchain-development",
"offline-computation"
],
"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",
"oneOf": [
{
"required": [
"function"
],
"properties": {
"include_selector": {
"const": true
}
}
},
{
"not": {
"required": [
"function"
]
},
"properties": {
"include_selector": {
"const": false
}
}
}
],
"required": [
"types",
"values",
"include_selector"
],
"properties": {
"types": {
"type": "array",
"items": {
"type": "string",
"description": "One closed-grammar ABI type with maximum nesting depth four"
},
"maxItems": 32,
"minItems": 0,
"description": "Supported canonical Solidity ABI types; uint/int aliases normalize to 256-bit forms"
},
"values": {
"type": "array",
"items": {
"description": "Boolean, string, byte/address/integer string, or positional tuple/array value as required by its type"
},
"maxItems": 32,
"minItems": 0,
"description": "Positional JSON values exactly matching types; integers are decimal strings"
},
"function": {
"type": "string",
"pattern": "^[A-Za-z_][A-Za-z0-9_]*$",
"description": "Function identifier required exactly when include_selector is true; never a full signature"
},
"include_selector": {
"type": "boolean",
"description": "Whether to prepend the four-byte selector for function and canonical types"
}
},
"description": "One bounded standard Solidity ABI encoding request",
"additionalProperties": false
},
"type": {
"type": "string",
"const": "http"
},
"method": {
"enum": [
"POST"
],
"type": "string"
},
"bodyType": {
"enum": [
"json",
"form-data",
"text"
],
"type": "string"
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object",
"required": [
"operation",
"algorithm_version",
"types",
"values",
"include_selector",
"payload",
"data",
"warnings"
],
"properties": {
"data": {
"type": "string",
"pattern": "^0x(?:[0-9a-f]{2})*$",
"description": "Complete encoded bytes, including selector when requested"
},
"types": {
"type": "array",
"items": {
"type": "string",
"description": "Canonical Solidity ABI type"
},
"description": "Canonical ABI types"
},
"_atlas": {
"type": "object",
"required": [
"docs"
],
"properties": {
"docs": {
"type": "string",
"format": "uri",
"maxLength": 512,
"description": "Documentation URL for this bridge"
},
"related": {
"type": "array",
"items": {
"type": "object",
"required": [
"bridge",
"url",
"docs",
"summary"
],
"properties": {
"url": {
"type": "string",
"format": "uri",
"maxLength": 512,
"description": "Related route URL"
},
"docs": {
"type": "string",
"format": "uri",
"maxLength": 512,
"description": "Related bridge documentation URL"
},
"bridge": {
"type": "string",
"maxLength": 64,
"description": "Related bridge name"
},
"summary": {
"type": "string",
"maxLength": 256,
"description": "Short capability summary"
}
},
"description": "One related Atlas route",
"additionalProperties": false
},
"maxItems": 3,
"description": "Bounded related Atlas routes"
}
},
"description": "Atlas documentation and related-route metadata added after deployment",
"additionalProperties": false
},
"values": {
"type": "array",
"items": {
"description": "Normalized exact JSON representation"
},
"description": "Normalized values in exact type order"
},
"payload": {
"type": "string",
"pattern": "^0x(?:[0-9a-f]{2})*$",
"description": "Selector-free canonical ABI payload"
},
"selector": {
"type": "string",
"pattern": "^0x(?:[0-9a-f]{2})*$",
"description": "Four-byte selector when included"
},
"warnings": {
"type": "array",
"items": {
"type": "string",
"description": "Warning"
},
"maxItems": 0,
"description": "Always empty for deterministic offline computation"
},
"operation": {
"type": "string",
"const": "abi-encode",
"description": "Stable route operation"
},
"include_selector": {
"type": "boolean",
"description": "Whether data begins with selector"
},
"algorithm_version": {
"type": "string",
"const": "solidity-abi-v1",
"description": "Pinned Solidity ABI grammar and byte contract"
},
"function_signature": {
"type": "string",
"description": "Canonical signature when selector included"
}
},
"additionalProperties": false
}
}
}
}
},
"category": "utilities"
}
}Provenance
- Seen in the source catalog
- 2026-09-15 06:32Z
- Last indexed by Roundhouse
- 2026-09-24 20:10Z
- Last enriched (probe, favicon, geo)
- 2026-09-20 13:15Z
- 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 EVM & Solana Utility Tools 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=EVM%20%26%20Solana%20Utility%20Tools' 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://chain-tools.use.x402atlas.com/evm/abi-encode, 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.