x402 client library for browser and Node.js - Easy payment requests
Native-fetch adapter for the Boson Protocol x402 buyer-side SDK — intercepts 402 escrow-scheme responses and retries with the X-PAYMENT header produced by @bosonprotocol/x402-client.
x402 client for VDM Nexus — agents pay AI inference per call with a signed Solana USDC transfer.
Policy evaluation, receipt hashing / chain verification, real x402 client adapter for Solana, treasury helpers, and an env-based kill-switch.
Client SDK for the x402 HTTP Payment Protocol — pay for x402-protected content
L402 + x402 client MCP - AI agents discover, pay for, and consume any payment-gated API
Boson Protocol x402 buyer-side SDK — framework-agnostic client that intercepts 402 escrow-scheme responses and produces the X-PAYMENT header.
Agent-side collector (HTTP/x402 client wrapper, partial-trust receipts).
Quicknode x402 client — multi-chain payment, SIWX auth, session management
x402 Payment Protocol
Standalone implementation of the Machine Payments Protocol (MPP) envelope: challenge / credential / receipt encode + sign + verify. Optional JWS wrapping layer for signed envelopes. Optional x402 client (on-chain USDC) and stripe-mpp client (Stripe SPT) f
Browser-environment adapters for the Boson Protocol x402 buyer-side SDK — wraps a viem WalletClient or a raw EIP-1193 provider (e.g. window.ethereum) as an X402bClient Signer.
x402 protocol primitives for Arc Network — types, EIP-712 helpers, EIP-3009 signer, x402 client, and Express middleware.
X402 payment protocol client for AceDataCloud APIs
TypeScript SDK for dTelecom x402 gateway — buy credits and create WebRTC/STT/TTS sessions
PaymentHandler for NanoSession x402 client
x402 Payment Protocol
x402 Payment Protocol SVM Implementation
x402 Payment Protocol EVM Implementation
x402 Payment Protocol Extensions
Client SDK for the Vybe x402 API. Pay-per-call USDC over HTTP and prepaid-credit WebSocket streaming for Vybe's Solana analytics API. Built for AI agents on Solana mainnet.
Official JavaScript/TypeScript SDK for rAizon_detra x402 AI APIs
Optional protocol extensions for x402 V2: payment-identifier (client idempotency) and access-token (signed proof-of-payment for cached access). Composable with the @nerochain/x402-server middleware and @nerochain/x402-client signers.
Agent-side fetch wrapper for the x402 V2 payment protocol on NERO Chain. Catches HTTP 402, signs a PaymentPayload via an injectable PaymentSigner, retries the request.
Server-side Ruby implementation of the x402 protocol providing Rack middleware to require payments and a facilitator client for verify/settle flows. Supports the 'exact' scheme across EVM and Solana networks.
Sibling gem to `blockchain0x`. Verify inbound x402 payments + issue x402-aware HTTP calls. Wire-format byte-equivalent with the Node, Python, and Go ports.
Enables HTTP 402-based on-chain payments for APIs and services using the x402 open standard. Includes Rack server middleware, Faraday client middleware, and a facilitator API client.
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