MCP.Market

Datasieve MCP server

by gitwormq·io.github.gitwormq/datasieve·v0.4.1
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On-chain watches, web-page monitors, dead-man switches, cron, and agent coordination, paid via x402.

A88/100grade A
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Safety scan
A88/100

full report

Adoption
New

0 stars46 downloads/wk

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If you have run it, two minutes of your experience saves the next person an afternoon.

Datasieve tools (19, 3 write)

write = sends, deletes, buys or posts

Read from the package source without running it. The installed server may list more.

  • coord_arrive

    Report that this part is done. Pass the arriveUrl from coord_barrier plus a part name and

  • coord_barrier

    BARRIER: "wake me when all N of my sub-agents finish." Returns an arriveUrl — hand it to

  • coord_events

    Collect barrier releases/partials that happened while nothing of yours was running.

  • coord_lock

    LOCK: "only one agent does this irreversible thing." Returns a leaseId, or 409 with who

  • coord_release
  • coord_workspacewrite action

    Buy a coordination workspace ($0.25 / 7 days, 1000 ops) — the only x402 seller of

  • create_watchwrite action

    Buy a standing watch from DataSieve (…). standard = $0.10/7d, 1 condition, 50 triggers;

  • cron_next

    Next N run times for a cron expression in any IANA timezone, plus seconds-until-next.

  • delete_watchwrite action
  • drain_events

    Collect everything the watch caught — works with zero infrastructure (the mailbox pattern).

  • pause_watch

    Stop a watch firing (chain, web, heartbeat, schedule) without deleting it. The expiry

  • payment_status

    Check whether a buying key is configured and whether it can afford a watch. Reports the

  • ping_heartbeat

    Keep a dead-man switch alive. Pass the pingUrl from create_watch (or a watchId whose ping

  • renew_watch

    Extends the watch one more period (7 days, or 30 on the *30 tiers) at its tier price and

  • resume_watch

    Backlog-free resume: heartbeat deadlines restart from now and schedules jump to their next

  • service_health

    Scanner cursor lag vs chain head — verify the watcher is alive before you buy.

  • verify_receipt

    Every DataSieve event carries receipt {alg, keyId, statement, sig} — an Ed25519 attestation

  • watch_status

    State, heartbeat lastCheckedAt, triggersUsed/cap, expiry, delivery stats, and for dead-man

  • x402_ping

    The cheapest possible real x402 purchase: proves this wallet + client can pay a production

Public scan report

scanner v0.1.9 · 2026-09-26 · same rubric, same numbers if you re-run it

no findings
  • Code scan4 source files scanned25/25
  • –Live reliabilityno gateway calls yet and no remote to proben/a
  • –Tool poisoningtools not inspected (local package is not executed); not countedn/a
  • Auth qualitylocal package, no credentials required12/15
  • Maintenancelast push 76 days ago12/15
  • Maintainer identityregistry namespace matches repository owner; GitHub account older than a year8/10
Overall 88/100. Components that don't apply are left out of the denominator. Any critical finding is an F.RubricAppeal a findingJSON

How Datasieve compares

Against every graded AI and agents MCP server, from our own scans and uptime checks. Updated after each scan run.

Safety score
88/100
higher than 80% of 4,460 AI and agents servers
Tools
19
the typical AI and agents server has 6
Tools that change things
16%
typical: 0%. Fewer write tools means less an agent can break
Downloads a week
46
more than 38% of 1,538 AI and agents servers with a package

What its tools let an agent do: 15 read · 1 create · 2 change · 1 delete

Install Datasieve in Claude Code, Cursor or VS Code

Runs npx -y datasieve-mcp on your machine. Read the scan report first; the gateway never runs local packages.

claude mcp add datasieve -- npx -y datasieve-mcp
Add to Cursor

What the publisher says

From the Datasieve repository's README, as published. We do not edit it. Read it on GitHub

datasieve-mcp

MCP server for DataSieve — standing infrastructure for AI agents, paid over x402. On-chain conditions on Base (wallet activity, whale transfers, price crossings, new pools), url-change web monitoring (CSS selector / regex scoped), dead-man switches for your own agents (your agent pings a URL; silence fires the alert), cron schedules (fire a webhook every N seconds, at a time, or on a cron expression), and multi-agent coordination (barriers + locks). Every event carries a signed Ed25519 observation receipt. No account, no API key: one gasless USDC payment per watch, signed locally — your key never leaves your machine. Failed calls are never billed.

Setup — no key required to start

claude mcp add datasieve -- npx -y datasieve-mcp

Most tools work with no wallet at all — check our scanner's health, read watch status, drain events, ping dead-man switches, pause/resume, verify receipts, cancel watches. Only the buying tools spend money.

The Claude Code skill (recommended)

npx -y datasieve-mcp --install-skill

Installs a skill into ~/.claude/skills/datasieve/ that teaches Claude when to reach for standing infrastructure proactively: arm a dead-man switch before long autonomous work, schedule wake-ups, watch pages and wallets, coordinate sub-agents.

When you want to buy

x402 means paying is a signature, so purchases need a key. Two rules:

never your main wallet. Payments are gasless (EIP-3009), so it needs no ETH.

  1. Use a dedicated burner wallet holding a few dollars of USDC on Base —
  1. Keep the key out of config files — point at a file instead:
echo '0xYOUR_BURNER_KEY' > ~/.datasieve/key.txt && chmod 600 ~/.datasieve/key.txt
claude mcp add datasieve -e DATASIEVE_PRIVATE_KEY_FILE=$HOME/.datasieve/key.txt -- npx -y datasieve-mcp

(DATASIEVEPRIVATEKEY=0x... inline also works if you prefer.)

The key never leaves the process: each payment is a signature authorizing exactly the route price — one at a time, nothing standing. Run payment_status to see the wallet, its balance, and prices before spending anything.

Rehearse for free

claude mcp add datasieve-sandbox -e DATASIEVE_API_URL=https://staging.datasieve.xyz \
  -e DATASIEVE_PRIVATE_KEY_FILE=$HOME/.datasieve/key.txt -- npx -y datasieve-mcp

Same API, Base Sepolia, faucet USDC. Sandbox watches last 1 hour.

Tools

Watch ids and secrets are remembered in ~/.datasieve/watches.json (mode 600), so follow-up calls only need the watch id — the persistent memory your ephemeral agent lacks.

Nothing above is checked by us. What we check is on the safety report.

Datasieve: common questions

Is Datasieve MCP server safe?
Yes, by our scan: it is graded A (88/100). Read the Datasieve safety report
How do I install Datasieve?
It runs on your machine. Copy the Claude Code, Cursor, VS Code or Claude Desktop config from the install section.
Does Datasieve need an API key?
No secret keys are declared. It reads 2 settings from the environment.
Is Datasieve maintained?
The last commit was 115 days ago (2026-07-12). The latest release is v0.4.1.
What can I use instead of Datasieve?
Servers from other publishers that do the same job: Robin: AI-Powered Dark Web OSINT MCP server, Charlotte MCP server and agent-device MCP server.
How does Datasieve compare with other AI and agents MCP servers?
safety score 88/100 (higher than 80% of 4,460 AI and agents servers); tools 19 (the typical AI and agents server has 6); tools that change things 16% (typical: 0%. Fewer write tools means less an agent can break). Full comparison.

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