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AgentUtil — Utility APIs for AI Agents
15 utility APIs for AI agents: fact verification, intent security, reversibility intelligence, baseline checks, situational awareness, documentation search,...
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82 % |
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FiatDock — the MCP marketplace where AI agents buy services per call
A marketplace where AI agents discover MCP services and buy them from other agents per call in USDC over x402 — paid straight to the seller's wallet, charged...
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80 % |
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TollWarden — payment security firewall for AI agents
Payment firewall for AI agents on x402: catches prompt-injection-triggered payments, replays, overpayment and lookalike tokens. Signed verdicts, non-custodial.
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80 % |
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Postlark · Postlark
Email verification API: syntax, MX, disposable, role, free-provider, typo correction, SMTP reachability, and catch-all detection in a single HTTPS call. 100...
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79 % |
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x402-vector — vector store for agents
A vector database agents pay for by the request. No accounts, no API keys, no subscriptions — just a wallet.
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79 % |
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WaterSMS – Real USA non-VoIP numbers for SMS verification
Rent a real US carrier number for a single verification code, a few hours, or a month. Not VoIP. Codes arrive in your browser in seconds, and you are refunde...
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78 % |
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SMS Viper — Virtual Numbers for SMS & OTP Verification
Buy temporary virtual numbers in 50+ countries and receive SMS verification codes in seconds. Wallet-based pricing, real-time OTP delivery.
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78 % |
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NumPool: Virtual Numbers & SMS Verification Instant codes.from $0.03
Receive SMS verification codes for any service on a real phone number, in seconds. Pay only when a code arrives. Global coverage and a clean API.
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78 % |
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Enrichr — 50 Billed Utilities, Fractions of a Cent Per Call
One API key. 50 billed utilities. Email syntax+MX (not mailbox), LLM token counting, slug generation, QR codes, currency conversion, profanity filtering, and...
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78 % |
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Emailku | Email at Protocol Speed
The transactional & marketing email API built for teams that live in the terminal.
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78 % |
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Agent Newsstand — market data & web intelligence for AI agents
15 pay-per-call endpoints for AI agents: tokenized-asset candles, SEC filings, earnings, US macro, web search, page reader, paywall unlock, screenshots. USDC...
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78 % |
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BIN Lookup API — Card Issuer, Brand, Country & Type
Card BIN lookup API with no signup. Resolve issuing bank, scheme, brand, card type, level and country from any 6-8 digit BIN. $0.01 per call in USDC — no API...
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78 % |
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payrail · the request is the payment
Payrail meters every model call your agent makes, bills it in USDC over HTTP 402, and settles hundreds of calls in one on-chain transaction. No account, no A...
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78 % |
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LookupLab | Check your phone list
Upload a CSV. Find phone carriers and line types. Download your results. Start with 1,000 free credits.
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78 % |
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77 % |
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Active Numbers — Stop Paying for Calls That Don't Connect
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77 % |
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Active Numbers — Stop Paying for Calls That Don't Connect
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77 % |
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402utils — pay-per-call API utilities
Micro API utilities for AI agents, priced per call and paid in USDC over the x402 protocol. PDF, screenshot, OG-image and more — no signup, no keys.
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77 % |
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x402sms — SMS verification for any agent
Virtual phone numbers and SMS verification for AI agents and humans. No accounts, no API keys — pay per activation in USDC via x402 on Base. You only pay whe...
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77 % |
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SignupVet · Your free credits are for real users, not bots
One API call checks the email, phone and IP of every new signup, spots bot waves across your recent signups and tells you: allow, review or block. 250 free c...
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77 % |
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