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Cross-Chain Payments for APIs | x402 Protocol
x402 enables autonomous agents to pay for API access using cryptocurrency, eliminating API keys and OAuth flows. Pay-per-request pricing with any wallet.
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87 % |
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XGateway x402 - Payment Gateway
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86 % |
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Polkax402 - Web3 Micropayments with X402 Protocol
Access premium APIs with instant on-chain payments using HTTP 402 Payment Required protocol. Powered by Polkadot and HTTPayer.
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85 % |
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Flow402 — Internet-native credits for HTTP 402
Charge per request without on-chain friction. Top up once with USDC; debit credits off-chain per call, return 402 when balance is low.
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84 % |
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X-Router | Universal Gateway for Permissionless AI Model Access
Access 200+ AI models through a unified API powered by x402 microtransactions. Pay per request with no API keys or subscriptions required.
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84 % |
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MoonMaker API — AI-Native Crypto Signals via x402
Real-time crypto trading signals API. No API keys, no subscriptions — pay per call with USDC on Base via x402 protocol. Built for AI agents and developers.
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84 % |
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PayWeave - Micropayments for AI Agents
Monetize APIs, serverless functions, and file downloads with micropayments. Automatic refunds and turnkey MPP and x402 integration for any web framework.
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84 % |
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Galliun — Wallet-native APIs: Inference + Marketplace
Galliun is a pay-per-request API platform. Use first-party AI inference (OpenAI-compatible) and monetized marketplace endpoints with x402 on Sui and Solana.
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83 % |
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four02 — Paywall-as-a-Service for AI Agents
Monetize your APIs for AI agents with zero code changes. Powered by x402 payments on Base L2.
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83 % |
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TariffMonkee: Pay-per-call APIs for AI agents
Small, single-purpose web data APIs that AI agents pay for per call in USDC over the x402 protocol (HTTP 402). No accounts, no API keys, no subscriptions.
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83 % |
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21.cash — Get paid per API call with x402
Wrap any API or URL in an x402 paywall, get listed where agents discover services, and settle in USDC on Base. No API keys, no invoices, no subscription.
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82 % |
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Channel — HTTP 402 Payments for Agents and APIs
Channel is a non-custodial HTTP 402 payment protocol for AI agents and paid APIs, using EIP-712 signatures and ERC-20 settlement.
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82 % |
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xSwap - The First x402-Enabled DEX
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82 % |
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API Nexo - Build APIs
Developer portal for API Nexo
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82 % |
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x402engine — Pay-per-call APIs for AI Agents
125 production APIs behind HTTP 402 micropayments. 87 LLMs, Kling V3 and Hailuo video generation, image generation, code execution, travel search, web scrapi...
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82 % |
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X402 AI Payment Gateway | Pay with USDC for AI Generation
Access AI image generation, text-to-speech, and document parsing APIs. Pay per request with USDC on Base — no API keys needed. Powered by the X402 payment pr...
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82 % |
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monapi — Monetize any API for AI agents in one line of code
monapi is a free, open-source SDK that adds pay-per-request USDC payments to any API. AI agents pay automatically via the x402 protocol. Express, Next.js, an...
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82 % |
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Genesis402 by UnyKorn · pay-per-call APIs for AI agents
Genesis402 by UnyKorn: 360+ pay-per-call APIs for AI agents, paid per call in USDC over x402 or MPP. No account, no API key. Every paid call returns an Ed255...
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82 % |
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coin24x7 — USDT BEP20 Gateway
Integrate USDT BEP20 deposits and withdrawals with the coin24x7 gateway.
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81 % |
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x402 Payment Channels - Micropayments for HTTP APIs on Solana
Framework-agnostic payment channel protocol for HTTP APIs on Solana. 99.8% cost savings with TypeScript-first implementation.
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81 % |
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