DataSieve

Endpoints (8 live)

• POST /coord/workspace — One shared workspace for a fleet of agents: $0.25 for 7 days and 1000 ops, every op free after this one payment. BARRIER: N sub-agents each get an arrive URL; the last arrival fires ONE webhook carrying every result, a missed deadline names who never showed. LOCK: leases that expire, so a crash cannot deadlock the fleet. KEYS: checkpoints a dead run resumes from. MAILBOX: a post-only URL safe to publish — in a web form, or handed to one sub-agent — that can only append to that one mailbox. (0.25 USDC on Base)
• POST /watch/standard — Something you cannot do while your agent is dead: keep watching. One paid call buys 7 days of it — on-chain on Base (wallet activity, whale transfers, price crossings, new pools), a dead-man switch that fires when YOUR agent goes silent, a cron/schedule webhook, or a url-change web monitor. Every event carries a signed Ed25519 receipt proving a third party observed it then — which your own logs cannot. Webhook or pollable mailbox. No account: the wallet is the identity. 50 triggers. (0.1 USDC on Base)
• POST /receipts/notarize — Prove something existed at a moment in time, for $0.005. POST any JSON and get an Ed25519-signed statement that this exact content reached a third party at that time. Secret? Hash it yourself and send only the digest — we store nothing and never see it. Your counterparty verifies the signature against our published key without trusting you OR us. Timestamp a finished task, a decision, a model output or a contract term, before a dispute exists — because you cannot notarize your own claim. (0.005 USDC on Base)
• POST /watch/standard30 — A 30-DAY watch with one condition on ONE payment ($0.35, 200 triggers) — same conditions as /watch/standard: on-chain on Base, heartbeat dead-man switch, schedule/cron, or url-change website monitoring. Built for agents that will NOT be awake to renew weekly: a dead agent cannot renew its own dead-man switch. Renewing extends 30 more days. HMAC-signed webhooks plus a pollable mailbox, every event with a signed Ed25519 receipt. Failed calls are never billed. (0.35 USDC on Base)
• POST /utils/cron-next — Cron expression parser: parse any 5/6-field cron and get the next N run times (any IANA timezone via "tz") plus seconds-until-next. $0.001 per call. POST {"cron":"0 9 * * *","tz":"America/New_York","count":5}. Unlike every other cron parser on this marketplace, the same host can also RUN your cron: POST /watch/standard with a schedule condition fires an HMAC-signed webhook on that expression for 7 days. Failed calls are never billed. (0.001 USDC on Base)
• POST /watch/composite30 — A 30-DAY composite watch on ONE payment ($0.85): up to 5 any-match conditions mixing chain (whales, prices, wallets, new pools), agent liveness (dead-man heartbeats), schedules/cron and url-change website monitors, with 800 triggers. The month-long version of /watch/composite for agents that cannot run a weekly renewal loop. Failed calls are never billed; every event carries a signed observation receipt. (0.85 USDC on Base)
• POST /watch/composite — A 7-day watch bundling up to 5 any-match conditions in ONE purchase, mixing chain (whales, prices, wallets, new pools), heartbeat dead-man switches, schedules/cron and url-change website monitors: "webhook me if this whale dumps OR my agent stops pinging OR this page changes". One payment, one webhook, one mailbox, 200 triggers. No account — agents arm their own switches at runtime with a wallet. Signed Ed25519 receipts; failed calls never billed. {"renew":"wt_..."} extends. (0.25 USDC on Base)
• GET /utils/x402-ping — 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. (0.001 USDC on Base)