x402 Services
| Rank | Service | Category | Chains | Volume · 30d | Transactions · 30d | Buyers |
|---|---|---|---|---|---|---|
| #404 | PQS promptqualityscore.com Prompt Quality Score | AI | Base, Solana | $0.057 | 9 | 7 |
| #405 | Marketplace for AI Agents marketplaceforaiagents.com Public API | Search | Base | $0.035 | 7 | 4 |
| #406 | Flight Fare Intelligence travel.forgemesh.io Paid flight price forecasts and buy/wait recommendations via x402. | Search | Base | $0.106 | 7 | 7 |
| #407 | Devryno x402 Services devryno.com Tiny paid web services for agents. Pay per request with USDC on Base via x402, plus non-x402 Base USDC tx-hash checkouts for Merchant Feed Audit, Base USDC… | Chain infra | Base | $0.026 | 15 | 5 |
| #408 | Kallipolis Proof API platoskallipolis.com Evidence resolution for public HTTPS domains and Base addresses, with x402 payment challenges and prepaid-credit support. PayAPI Market independently verified… | AI | Base | $0.12 | 12 | 7 |
| #409 | Old2New Agent API old2new.app Old2New transforms recipes to match dietary restrictions and health goals, using the same transformation and dietary-safety pipeline that powers the Old2New… | AI | Base | $10.25 | 3 | 1 |
| #410 | FuelTax IFTA Rates API freestylevault.com IFTA quarterly tax rate matrix (iftach.org), human-reviewed import each quarter. Reference data. Verify against the official IFTA matrix before filing. Paid… | Data | Base | $0.035 | 7 | 6 |
| #411 | AlphaPipeline Macro Calendar alphapipeline-eu.onrender.com Pay-per-call ($0.005-$0.03 USDC) market/on-chain data API for AI agents and trading bots | Data | Base | $1.74 | 87 | 8 |
| #412 | Agent Café 402.coffee Agent Café — the trust layer for agent payments (x402 on Base). Four services on one endpoint: CERTIFY a paying agent (public certificate + badge), SCORE any… | AI | Base | $0.20 | 2 | 2 |
| #413 | Toolshed lemon-agent.dev Post a file to a hosted tool and read the converted file back — nothing to install. Where we do not host the job, the entry names the tool worth reaching for… | AI | Base, Solana | $0.032 | 10 | 4 |
| #414 | Saymon RU Data API payforapi.com Saymon RU Data API - the legal window into the Russian market for AI agents. Russian-language (Runet) data, pay-per-call via x402: company checks by INN… | AI | Base | $0.142 | 13 | 1 |
| #415 | Duo Data Utilities duoleads.com 33 independent pay-per-call data utilities: identifiers and check digits, dates and zones, text and Unicode, encodings and digests, geodesy, blockchain… | AI | Base | $3.80 | 76 | 5 |
| #416 | eu-validate 88-198-100-115.sslip.io One request checks an IBAN (offline mod-97 checksum), an EU VAT number (live VIES lookup) and a company domain (DNS/MX). Paid per call with x402: 0.01 USDC on… | AI | Base | $0.05 | 5 | 2 |
| #417 | BitBooth heinrichstech.com Paid x402 Endpoints | Search | Base, Solana | $0.035 | 13 | 10 |
| #418 | SendQuoteNow sendquotenow.com Generates branded, customer-ready quotes, estimates, and priced proposals as hosted PDFs in about one second — with line items, tax, discounts, a hosted… | Data | Base | $0.30 | 3 | 3 |
| #419 | Onvexia onvexia.com Crypto Sentiment, Whale Tracking & Onchain Analytics API | AI | Base | $0.006 | 5 | 6 |
Showing 401–416 of 3,236