Dev tools

Pre-install security scanner for AI agent skills and tools. Fetches a third-party skill/package without running it, screens against known-bad threat data, and returns a structured threat report. $0.03/scan on Base; free hash lookups and lockfile checks.

Managed platform for deploying x402-paid API endpoints. Write a TypeScript handler, set your price ($0.000001/req min), run `bankr x402 deploy`. The x402 layer is injected automatically; endpoints live at x402.bankr.bot and are agent-discoverable. USDC on Base. Free to start, 5% fee on earnings.

22 utility MCP tools for AI agents: web scraping, link risk assessment, prompt-injection detection, image moderation, PDF generation, email and webhook notifications, semantic memory and embeddings. Pay-per-call USDC on Base; available as open-source npm package @melis-ai/x402-tools-mcp.

Non-custodial marketplace for paid HTTP APIs using x402 + USDC on Base. 13-tool MCP server (npx @gatefare/mcp) for API discovery, automated 402 payment handling, and publishing. Payments split 90% publisher / 10% platform via 0xSplits contracts.

Multi-chain agent-to-agent marketplace exposing 619 deterministic microservices via an MCP bridge, payable per call in USDC with no signup. Tiered pricing (Micro/Basic/Standard/Premium).

Structured data on 5,336+ AI tools via REST API and an MCP server: search, compare and retrieve tool profiles. Pay-per-call in USDC on Base via x402.

Open x402 index with 1,346 deterministic tools: web/documents, live public data, unit conversions, text processing, encoding, validation and more. Wallet-is-identity model — no signup, pay per call in USDC on Base, Solana, Polygon and Arbitrum. 1,156 free proof-of-work CPU tools included.

Unified API platform for AI agents: 64 tools across AI generation, web scraping, crypto data, and utilities. Single POST per call; pay-per-request in USDC via x402 on Base, Ethereum, Solana, and 12+ chains.

MCP server exposing 38 pay-per-call APIs: LLM inference (15 models), image generation, audio transcription, TTS, embeddings, crypto/market data, blockchain tools, and IPFS storage. USDC on Base/Solana; USDm on MegaETH.

Hosted MCP server with 17 pay-per-call tools: entity due diligence ($0.50), Gulf Arabic NLP, email verification, web scraping (basic and structured), crypto prices, weather, gold prices, prayer times, legal simplification, and screenshots. USDC on Base via x402; no API key required.

574+ live keyless API endpoints across 106+ categories (Crypto 46, Government 56, Finance, Medical, Space, Patents) payable via x402 on Base and Solana. Features ai.council (multi-model consensus), Watchers (event-driven callbacks, $0.05), and wallet-scoped agent memory. From $0.001/call.

Agent-to-agent commerce protocol and discovery layer: one MCP server (catalog, product, purchase, affiliate, commissions tools) indexing 114 x402-payable products across multiple vendors. Agents earn affiliate commissions; 1% protocol fee; $0.01 on-chain settlement per purchase.

29 Cloudflare Workers AI models (LLMs, vision, reasoning, embeddings, image gen, TTS/STT) payable per request in USDC on Base — no API key or subscription required.

Persistent home for stateless AI agents: 271 MCP tools for durable identity/handle registration, key-value and semantic memory, agent inbox, headless browser, and errand offloading. Free tier 500 calls/month; USDC on Base beyond.

21-primitive x402 execution engine on Base: post-quantum security, AI inference (LLM/STT/embeddings/image-gen), browser automation, web search, DNS auditing, key-value + object storage, agent identity/passport, IPFS verification, and trust bundles. No account required.

47 x402-gated utility endpoints for AI agents across Base, XRPL, Stellar, and XRPL EVM: JSON repair, YouTube transcripts, webpage rendering, web monitoring, DNS/WHOIS, blockchain balances, wallet risk assessment, honeypot detection, PII redaction, JWT verification, and more.

On-chain ERC-8004 agent registry indexing 22,000+ AI agents across 17 blockchains. Agents search for peers, register on-chain identities, and build cryptographic reputation — all paid in USDC on Base via x402. Supports MCP, Google A2A, and OASF.

9-tool security MCP server: URL scanning, breach detection, prompt injection detection, and domain/IP reputation for AI agents. Pay-per-call in USDC on Base via x402. Free tier: 10 calls/endpoint/day.

14 deterministic truth endpoints for AI agents: astronomical positions (NASA JPL), magnetic field (NOAA WMM2025), timezone math, randomness via drand, timestamped proofs, timelock encryption, and 8 text-analysis tools. EIP-191-signed receipts per call.

62 pay-per-call endpoints for AI agents covering live prices, web scraping, site audits, uptime monitoring, SEO/accessibility checks, QR/barcode generation, agent memory datastore, and LLM gateway; USDC on Base from $0.001 per call.

TypeScript client SDK for Vybe Network's Solana analytics API using x402 micropayments. Supports HTTP pay-per-call and prepaid WebSocket streaming sessions; no API key or subscription required.

Document intelligence API for AI agents: fetch any webpage or PDF as clean markdown (/read), convert unstructured text to schema-compliant JSON (/jsonify), compress long prompts (/token-reducer), and route queries through Claude with context optimization (/ask-cheap). USDC on Base.

20 pay-per-request tools for AI agents covering web scraping, screenshots, PDF parsing, email validation, domain intel, and utilities. No API keys — USDC micropayments on Base via x402.

Cryptographically attested data marketplace for AI agents. Provides weather, markets, code, security, and knowledge feeds via MCP. Every response includes an EIP-712 signed receipt. On-demand queries pay USDC on Base via x402.

Visual AI agent builder that publishes flows as pay-per-call x402 endpoints in USDC on Base. 61 templates for music generation ($0.20), stem separation, lyric gen ($0.04), IP-registry lookups ($0.005), and LLM workflows. Any published flow is discoverable and callable by other agents.

Signed web attestations and x402 conformance grading for AI agents: URL snapshots with ed25519 signatures, change watchers, sports settlement proofs, and preflight verification of payment-endpoint safety.

Claim grounding and citation verification MCP server for AI agents. Checks a stated claim against live sources and returns a verdict, confidence score, and citations. Installable via `claude mcp add groundcheck -- npx -y groundcheck-mcp`. Free trial endpoint; paid verification via x402.

MCP server giving AI agents access to 2,800+ APIs via x402 micropayments on Base at a flat $0.01 per call. No signup or API keys needed — browse, call, and pay in USDC per request via the @orbisapi/mcp npm package.

Pay-per-use API marketplace with 48 routes (26 paid + 21 free) spanning AI/LLM chat, image generation, OCR, crypto prices, weather, maps, QR codes, and text-to-speech. Pay in USDC on Base via x402; MCP-compatible via `npx goldbean-mcp`.

Fail-closed AI trust layer: detects hallucinations, validates citations, traces claim provenance, screens for prompt injection, and redacts PII. Eight primary tools at $0.02–$0.03/call; also exposes a free web scanner. Reports a confidence score and evidence per verdict.

41 context-efficient MCP tools for AI agents — deterministic web extraction, search, and utilities, with a benchmarked 98.1% token reduction. Pay per tool call in USDC on Base via x402; no signup or subscription required.

x402 developer platform with 9 paid endpoints for AI-powered code generation on Base: website cloning, Farcaster mini-app creation, API spec generation, test writing, docs, CI/CD configs, TypeScript refactoring, GitHub issue fixes, and Bluesky labeling. $1–$5 USDC per call.

Python x402 payment layer that auto-pays USDC on Solana with zero code changes for httpx/requests users. ~0.5 s payment latency, 6-layer budget protection, 775+ tests. Includes ag402-client-mcp for MCP integration with Claude Code and Cursor.

Universal MCP gateway aggregating 981 tools across 275 providers behind one endpoint. Pay-per-call with x402 USDC on Base (plus MPP USDC on Tempo). Single MCP URL for agents to reach many upstream APIs.

Hono middleware for gating API endpoints behind x402 USDC payments. Supports recurring payment agreements, SIWx sessions for returning customers, and local on-chain verification without an external facilitator dependency. Base mainnet.

TypeScript SDK combining x402 payments (fetch402, smartFetch402 with best-provider routing) and ERC-4337 gasless smart accounts. Includes payment agreements, XMTP messaging, reputation tracking, and ERC-8128 signatures. Base mainnet and Sepolia.

Agent-native LLM router supporting 55+ models with x402 USDC micropayments on Base and Solana. Routes across OpenAI, Anthropic, Google, xAI, and DeepSeek using wallet-based auth — no API keys or subscriptions required.

Drop-in x402 payment middleware for ElysiaJS servers — add per-route USDC pricing to a Bun API in a few lines.

Open EIP-3009/EIP-712 signing library for x402 with zero ethers/web3 dependency. Available in JavaScript (npm) and Python (pip) with byte-identical wire formats. Optional inference routing through hivecompute with ZK attestation. MIT licensed.

TypeScript SDK for building AI agents that sell and buy services via x402, A2A, and AP2 protocols. Transforms typed functions into discoverable paid endpoints with built-in payment admission, idempotency, and accounting.

Payment layer for MCP servers and plain HTTP APIs. Wrap existing servers with per-call x402 pricing; includes hosted registry and createPaidMcpHandler tooling.

MCP server for the x402 protocol that lets AI agents discover and call payment-gated HTTP APIs automatically. Exposes five tools: paid_http_request, discover_x402_api, pay_x402_endpoint, parse_x402_challenge, and verify_x402_proof — handling the full 402 payment flow end-to-end.

MCP server that signs x402 payment headers from a provided key — lets any MCP-capable agent pay for x402 resources without native wallet support.

Multi-chain x402 SDK for AI agents: drop a single moltspay.services.json to monetise any existing function. Supports Base, Solana, Polygon, BNB Chain, and fiat rails (Alipay/WeChat Pay CNY). Includes MCP server integration.

Open-source, one-function SDK to add x402 pay-per-request pricing to any Express, Next.js, or MCP server. Non-custodial: payments flow directly to the developer's wallet. 75M+ transactions settled.

Multi-chain x402 payment infrastructure with SDKs in TypeScript, Python, Rust, Go, and C. Enables pay-per-request API monetization on Base and Solana with one-line middleware integration.

Starter templates for monetizing MCP servers three ways: no-code (xpay), DIY x402 (USDC, ~50 LOC), and Stripe metered billing. TypeScript, with demo tools (summarize, sentiment, keyword extraction).

TypeScript and Python SDK for AI-agent x402 payments. Supports USDC and EURC on Base, Optimism, Arbitrum, and Polygon. Hosted facilitator at api.paybotcore.com; human-in-the-loop approvals and micropayment batching built-in.

Provider-agnostic Python payment middleware for MCP servers. Adds @price decorators for pay-per-request billing; supports x402 (USDC on Base and Solana) plus Stripe, PayPal, Coinbase Commerce and others, with Mode.AUTO selecting a provider by client capability.

Multi-chain x402 SDK and MCP server for AI agents: 29 chains (EVM + Solana, TON, Tron, NEAR, Sui, Aptos, Stellar, XRP). @piprail/mcp gives agents discover, quote, pay, and budget tools. @piprail/sdk lets any API gate itself — zero platform fee, funds settle direct to wallet.

Universal x402 payment facilitator written in Rust, supporting Base, Avalanche, Polygon, Solana, and Sei. Processes stablecoin micropayments (USDC, USDT) for both humans and AI agents across multiple blockchains.

AI agent governance and intelligence platform exposing 100+ tools across finance, healthcare, real estate, crypto, and enterprise systems (Salesforce, Epic, Workday, HubSpot). Pay-per-call in USDC on Base via x402; responses include ML-DSA-65 post-quantum cryptographic attestation.

Stripe preview integration lets developers charge AI agents for API calls, MCP tool invocations, and HTTP requests via USDC on Base using the PaymentIntents API. Includes open-source purl CLI and Node/Python code samples.

46-tool paid MCP server on a USDC-on-Base agent-to-agent payment rail: marketplace browsing, document conversion, and data fetching tools. EIP-3009 settlement; no API key required. Available as the @voidly/pay-mcp npm package.

Official x402 Python SDK on PyPI, providing FastAPI/Flask middleware to gate endpoints behind USDC payments plus an auto-pay client session for buyers.

One-click Next.js template: AI SDK agent with a CDP-managed wallet that pays x402-gated MCP tools on Base Sepolia. The fastest way to see the full agent-pays flow.

Official x402 example implementations (TypeScript, Python, Go) showing payment-gated HTTP endpoints and matching clients across Express, Next.js, Hono, FastAPI and more - reference starting points for building x402 sellers and buyers.

Drop-in FastAPI paywall decorator for Python AI agent routes. One decorator adds HTTP 402 USDC micropayments to any endpoint with no signups. Supports Base, Polygon, Arbitrum, and Solana via x402 v2.10+ with Coinbase's hosted facilitator.

Official Express.js middleware for x402. One line of middleware gates routes behind USDC payments and forwards signed payments to a facilitator's /verify and /settle endpoints; defaults to the x402.org facilitator on testnet.

Production Go library for x402: server middleware for net/http, Chi, Gin, and PocketBase; HTTP client with automatic payment handling; MCP integration. USDC on 8+ chains (Base, Polygon, Avalanche, Solana). The canonical Go x402 SDK.

Official Hono middleware for x402 (usable on Cloudflare Workers and other edge runtimes), gating routes behind USDC payments settled via an x402 facilitator.

Modular, framework-agnostic Rust SDK for building x402 integrations: x402-signer (buyer signing + reqwest middleware), x402-paywall (framework-agnostic HTTP middleware, Axum examples), and x402-core. Ships new networks without upstream PRs.

Open-source wrapper over mcp-handler adding paidTool() to Next.js MCP servers, plus withPayment() for AI SDK clients. The reference x402+MCP integration.

Official Next.js App Router middleware for x402, gating routes/handlers behind USDC payments verified and settled through an x402 facilitator.

Drop-in replacement for the OpenAI Python client that adds transparent x402 micropayment support. When a server responds with 402, the library automatically signs and retries with USDC — no code changes required.

Production-grade Rust toolkit for x402: protocol types, Axum server middleware (x402-axum), a reqwest client wrapper (x402-reqwest), and a self-hostable facilitator server binary with Docker images.

Zero-SDK hosted x402 proxy: connect a wallet, point at your backend, get a paywalled proxy URL on Base. Customers pay USDC per request; operator receives 99% with real-time revenue analytics. Beta: 1% take rate, up to 5 routes. Open-source MIT core (x402-kit) for self-hosting.