MARKET MONITOR / CATALOGUE Services 133,908 MCP listed 40,872 x402 93,117 Rails Base / Solana / Polygon / Arbitrum Imported 2026-10-31 · 3 sources
Task

Webhook

15 services carry this tag in their source record. Tags come from the provider, not from us — a tag is a claim about what the service does, not proof that it does it well.

IntegrityPhase x402 REST usage

Signed proof of data integrity checks for events, logs and API results. Source authentication of a registered app; freshness checks. Tamper-evident receipts; offline verification with trusted key and original data. No pr...

api.integrityphase.com Security 33 calls / 30d checked 2026-10-31
11.189438 USDC per call per call

Aura Agent Persistence x402 REST usage

Give an autonomous agent what it structurally lacks: a real email address that receives verification codes, its own webhook URL, durable memory that survives between runs, and the ability to block on an event - an email,...

aura.rohnelt.dev Comms & Messaging 1 calls / 30d checked 2026-10-28
1 USDC per call per call

Agent-Cron-Service x402 REST usage

Agent-Cron-Service: schedules a recurring trigger (crontab expression, timezone-aware) delivered to a verified webhook or email, paid per trigger in USDC. POST the job definition; the 402 quotes the exact price.

api.x402cron.com Comms & Messaging 2 calls / 30d checked 2026-10-31
0.1 USDC per call per call

402cron: Scheduled Webhooks x402 REST usage

Cron job scheduler for AI agents: calls your HTTPS endpoint on a cron expression (recurring webhook, scheduled callback, heartbeat, reminder). ENTRY pack: 20 deliveries for $0.02 ($0.001/delivery). Same service, best rat...

402cron.com Other services 6 calls / 30d checked 2026-10-31
0.02 USDC per call per call

Settled x402 REST usage

Price: $0.002 in USDC on Base. Signed check of an x402 endpoint before you pay it: who really pays it on Base (settlements and unique payers over 30 days), a fresh unpaid probe (cached ≤5 min) with status, latency and th...

settled.tools Crypto & Payments 13 calls / 30d checked 2026-10-31
0.002 USDC per call per call

AlphaPipeline HIP-4 Alerts x402 REST usage

[EXPERIMENTAL] Subscribe a webhook to receive push notifications when a HIP-4 outcome's probability jumps past a configurable threshold, or a new market appears - so an agent no longer has to poll hip4-snapshot itself. P...

alphapipeline-eu.onrender.com Crypto & Payments 1 calls / 30d checked 2026-10-30
0.02 USDC per call per call

AgentWire x402 REST usage

AgentWire service card for webhook inbox relay and web fetch infrastructure.

cdp-agent-0-01.onrender.com Comms & Messaging 18 calls / 30d checked 2026-10-31
0.001 USDC per call per call

GCD + LCM x402 REST usage

Greatest common divisor and least common multiple of two or more integers, computed exactly (arbitrary precision). Useful for cycle alignment, scheduling periods and fraction work. Signs are ignored; a zero makes the LCM...

agent402.tools Other services 13 calls / 30d checked 2026-10-31
0.001 USDC per call per call

Agent Inbox and Message Queue x402 REST usage

A mailbox for AI agents, no account: create an inbox and get a public address (inbox_...) plus a secret. Any agent that knows the address can send you JSON messages (op send, with subject, from and reply_to); you fetch t...

agentsvc.io Comms & Messaging 4 calls / 30d checked 2026-10-31
0.003 USDC per call per call

StableDomains Drop Alerts x402 REST usage

Drop alert for one domain: we POST to your webhook (or email you) when it becomes registrable. No account needed.

stabledomains.net Web & Scraping 1 calls / 30d checked 2026-10-31
0.01 USDC per call per call

Webhook signature verify x402 REST usage

Verify a webhook's HMAC signature against the correct per-provider scheme: GitHub (X-Hub-Signature-256, sha256=hex), Stripe (Stripe-Signature t/v1 over "<t>.<body>" with replay tolerance), Shopify (X-Shopify-Hmac-Sha256,...

agent402.tools Comms & Messaging 9 calls / 30d checked 2026-10-31
0.001 USDC per call per call

HMAC signature x402 REST usage

HMAC signature. Compute an HMAC of a message with a key using SHA-256 (default), SHA-1, SHA-384 or SHA-512, in hex and base64. Use to check webhook signatures. The key is used only for this call and is not stored.

agent-data-tools.revmesh2074.workers.dev Data & Finance 4 calls / 30d checked 2026-10-31
0.002 USDC per call per call

Citiview Agent Market x402 REST usage

Breached password check: is this password in known data breaches, and how often? Send only the SHA-1 hash (never the password); just the first 5 characters reach Have I Been Pwned (k-anonymity). Up to 50 hashes per call.

agents.citiviewgroup.com Security 3 calls / 30d checked 2026-10-28
0.002 USDC per call per call

Solana Watchdog watch x402 REST

Use this to be told when a Solana program you rely on changes hands or code, or when a new advisory hits your Cargo.lock: 30 days of hourly checks, signed webhook on each change. One payment.

solana-security-watchdog-scan.fly.dev Crypto & Payments checked 2026-10-29
0.9 USDC per call per call

EVM Watchdog watch x402 REST

Use this to be told when a contract you rely on (Base, Robinhood Chain) gets new code, a new owner or weaker upgrade rules, or when a new advisory hits your npm lockfile: 30 days of hourly checks, signed webhook on each...

evm-watchdog-scan.fly.dev Dev & Code checked 2026-10-29
0.9 USDC per call per call

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