DataSieve
x402 payment self-test: verify your agent's payment stack end-to-end against a production seller for $0.001. Returns payer address, network and server time; the settlement tx lands in the X-PAYMENT-RESPONSE header. Smoke-test a new wallet, client library, or an agent's first-ever paid call before pointing it at anything expensive. Failed calls are never billed. This host also sells standing infra: on-chain watches, dead-man switches, cron schedules, url-change monitors, coordination.
The wallet the 402 directs payment to. Its whole payment record — every payer, every chain — is on the merchant page.
Asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913
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.
{
"docs": "https://api.datasieve.xyz/llms.txt",
"error": "payment required",
"terms": "price, asset, network and payTo are in the payment-required header",
"alsoSoldHere": {
"POST /watch/standard ($0.10)": "watch Base, a web page, a cron, or your own agent going silent — for 7 days",
"GET /utils/x402-ping ($0.001)": "cheapest end-to-end test that your payment stack works",
"POST /coord/workspace ($0.25)": "barriers, locks, shared state and mailboxes for a fleet; every op free after this",
"POST /receipts/notarize ($0.005)": "signed proof this content existed at this time"
},
"rehearseFree": "https://staging.datasieve.xyz — same API on Base Sepolia, faucet USDC",
"notWhatYouNeeded": {
"body": {
"from": "optional, your name",
"want": "what you needed that we do not sell"
},
"cost": "free, no account, no payment — a human reads these and they decide what gets built",
"tellUs": "POST https://api.datasieve.xyz/feedback"
}
}Accepts
The payment requirements as published to the catalog. Read the live 402 before paying — a price here is a claim, not a quote.
Pay 0.001 USDC on Base to 0xFE31…95F21. The signed payment is good for 5 minutes.
- Paid to
- 0xFE31…95F21
- USD Coin contract
- 0x8335…02913
- Payment window
- 5 minutes
- As published
- 1000 smallest units
The catalog’s raw entry
[
{
"asset": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"extra": {
"name": "USD Coin",
"version": "2"
},
"payTo": "0xFE31fD52A89461B8d54895cfCf86187aa3C95F21",
"amount": "1000",
"scheme": "exact",
"network": "eip155:8453",
"maxTimeoutSeconds": 300
}
]Extensions
{
"bazaar": {
"info": {
"input": {
"type": "http",
"method": "GET",
"queryParams": {}
},
"output": {
"type": "json",
"example": {
"ok": true,
"paid": true,
"payer": "0xabc…",
"amount": "$0.001",
"scheme": "exact",
"network": "eip155:8453",
"serverTime": "2026-07-12T00:00:00.000Z"
}
}
},
"schema": {
"type": "object",
"$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"
],
"type": "string"
},
"queryParams": {
"type": "object",
"properties": {}
}
},
"additionalProperties": false
},
"output": {
"type": "object",
"required": [
"type"
],
"properties": {
"type": {
"type": "string"
},
"example": {
"type": "object"
}
}
}
}
}
}
}Provenance
- Seen in the source catalog
- 2026-07-13 16:02Z
- Last indexed by Roundhouse
- 2026-07-16 20:50Z
- Last enriched (probe, favicon, geo)
- 2026-09-21 08:45Z
- x402 version
- 2
- Max timeout
- 300s
- Liveness probe
- HTTP 402
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.
Show the promptHide the prompt
Using Roundhouse, look up the x402 service DataSieve 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=DataSieve' 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.datasieve.xyz/utils/x402-ping, 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.