Sell an API for Kaspa over HTTP 402. Quotes a price, then verifies the payment is in the UTXO set before serving — it never trusts the payment header.

Pay an x402 HTTP 402 in BSV — the missing bsv-p2pkh payment builder for x402 agents. Also verifies BSVKey inference usage receipts and per-call x402 delivered receipts.

CLI for Xenarch — non-custodial x402 MCP server for AI agents. Claude, Cursor, LangChain and CrewAI pay HTTP 402–gated APIs with USDC on Base L2.

Online Agent-to-Agent (A2A) Micropayment Meter & HTTP 402 Paywall Middleware for Node.js, Express, Fastify, and AI Agents.

Online Micro-metering and monetization middleware for Model Context Protocol (MCP) servers and AI agent tool invocations with sub-35ms HTTP 402 settlements.

Know which AI agents cross your API — verified by signature, not guessed from an IP. Sorts every request into four lanes, prices the non-human ones with HTTP 402, and never charges a human. Zero dependencies.

Autonomous HTTP 402 Web Scraper and Markdown Extraction Plugin for ElizaOS agents on Base L2 with dual-rail USDC micropayments and 2-call free grace tier

Monetise any API with HTTP 402 payments. Payment-rail agnostic middleware for Express, Hono, Deno, Bun, and Workers.

No-payment x402 public-surface checker for manifests, OpenAPI specs, and HTTP 402 challenges.

Axios interceptor for T402 HTTP 402 payment protocol

Core provider-side primitives for canonical HTTP 402 challenges, payment verification, execution receipts, and atomic replay protection.

One short command for the whole life of a Warda grant: create it, see what it may spend, pay behind an HTTP 402, and read back every attempt. Adds no capability — the rules stay in @warda_protocol/core.

fetch() with automatic x402 micropayment handling. Drop-in replacement — auto-pays HTTP 402 responses using USDC on Base L2 or Solana.

MCP server middleware for HTTP 402 Payment Required with support for multiple networks including OKX/XLayer

Multi-tenant payment gateway for API monetization with autonomous agent settlement on Base L2. Implements HTTP 402 protocol with USDC micropayments and programmatic fee routing.

Pay HTTP 402 (x402) invoices from a Warda grant on Kaspa, so an agent's spending limits are enforced by consensus rather than by the process holding the key.

Govern x402 (HTTP-402 machine payments) with Countersign — guard an agent's payment against policy before it pays.

Reference implementation of the `nearintents` payment method for MPP (Machine Payments Protocol) — cross-chain HTTP 402 payments settled by NEAR Intents. Extends mppx.

Client utilities to handle HTTP 402/x402 retries (X-PAYMENT)

Declarative hypermedia micropayment extension for HTMX. Native HTTP 402 Payment Required handling, sub-2KB zero-dependency footprint, and hardware-attested server-driven state execution.