Stale or abandoned repos — learn what died before you depend on it.
Open source directories rarely show failures. This graveyard surfaces projects that look abandoned: no repository activity for a year or more and limited traction — or text that marks them deprecated/archived. Use it as a negative signal when evaluating dependencies.
Absence from this list is not a guarantee of health; always check recent commits. For the opposite filter, see Recently Active and Production-Ready.
Selection criteria: no meaningful activity for 365+ days, under 30 stars (or explicitly archived/deprecated in text).
Sui USDC payment method for the Machine Payments Protocol (MPP)
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Unified route builder for Next.js App Router APIs with x402, MPP, SIWX, and API key auth
Grantex agent identity and delegation for MPP (Machine Payments Protocol)
MCP server for 402 Index — search 15,000+ paid API endpoints across L402, x402, and MPP protocols with real-time health monitoring
The easiest way to work with dates in JavaScript and TypeScript.
Lightning-native Machine Payments Protocol SDK with pluggable payment adapters
A bank account for AI agents on Sui — guided setup, MCP, send, save, borrow, invest, rebalance
Dexter managed Solana settlement for the Machine Payments Protocol
Full-stack x402 SDK - add paid API monetization to any endpoint. Express middleware, React hooks, Access Pass, dynamic pricing. Solana, Base, Polygon, Arbitrum, Optimism, Avalanche, SKALE.
Armory x402 SDK — Protocol extensions for x402 payments. Add SIWX, payment ID, Bazaar discovery, and custom extensions.
Armory x402 SDK — Core protocol types, EIP-712 signing, encoding, network configs, and token registry. 100% compatible with Coinbase x402 SDKs.
Akca x402 SDK - Pay-per-use proxy and VPN via Solana USDC
Armory x402 SDK — Payment middleware for Hono. Accept x402 payments from any client in your Hono app. 100% compatible with Coinbase x402 SDKs.
Armory x402 SDK — Payment middleware for Express v5. Accept x402 payments from any client in your Express app. 100% compatible with Coinbase x402 SDKs.
Armory x402 SDK — Payment middleware for Elysia. Accept x402 payments from any client in your Elysia app. 100% compatible with Coinbase x402 SDKs.
Production-ready Solana micropayments library wrapper for official x402 SDK
Armory x402 SDK — Payment middleware for Next.js App Router. Accept x402 payments from any client in Next.js. 100% compatible with Coinbase x402 SDKs.
TIP-20 payment reconciliation SDK for Tempo blockchain
SDK for AI agents to auto-pay HTTP 402 APIs with on-chain TIP-20 transfers on Tempo
Hono middleware that adds HTTP 402 paywall to API endpoints — verify on-chain TIP-20 payments on Tempo
Agentic Commerce Protocol (ACP) integration for PEAC
CLI for ACE (Agentic Commerce Engine) APIs: feeds, content, enrichment, credits
Agentic commerce tools for Boson and Fermion protocols
TypeScript types, Zod schemas, and Axios client for PayPal Cart API v1
TypeScript client for ACE (Agentic Commerce Engine) API: feed enrichment, content generation, context rules, language detection
AnySpend x402 Express middleware - Extended x402 payment protocol integration for Express.js
AnySpend x402 Hono middleware - Extended x402 payment protocol integration for Hono with multi-token support
x402 payment middleware for TON — make any Express API payable in TON with anti-replay, on-chain verification, and pluggable storage
AnySpend x402 Payment Protocol - Extended implementation with multi-chain support
x402 Facilitator for AgentPay �?Bridge between x402 protocol and CKB Fiber Network
AnySpend x402 Fetch client - Extended x402 payment protocol integration for native fetch API with multi-token support
A wrapper around x402/fetch that: - calls the x402f access control server - decrypts results using [fangorn](https://github.com/fangorn-network/fangorn)
Dark Forest payment helpers for TaskForest: MPP wrapper, PER delegation, and settlement utilities
Bitcoin-native MCP server for AI agents: BTC/STX wallets, DeFi yield, sBTC peg, NFTs, and x402 payments.
Token-gate mppx routes using signed wallet attestations — 32 chains, no RPC management
Stableyard payment method for the Machine Payments Protocol (MPP). Any chain in, any chain out, fiat settlement.
Lightning Network payment method for Machine Payments Protocol (MPP)
OpenZeppelin Relayer Plugin for X402 Facilitator
x402 payment protocol - facilitator SDK for verifying and settling payments on-chain
Unified x402 facilitator server — supports EIP-7702 (any ERC-20) and ERC-3009 (USDC) payment mechanisms
x402 facilitator service - handles HTTP 402 payment flows for agent-to-tool micropayments
TypeScript SDK for x402-protected HTTP and WebSocket proxy endpoints.
An AI-payments project tracked in the mpp.best directory.
An AI-payments project tracked in the mpp.best directory.
An AI-payments project tracked in the mpp.best directory.
An AI-payments project tracked in the mpp.best directory.
AnySpend x402 Next.js middleware - Extended x402 payment protocol integration for Next.js with multi-token support
PayStream x402 Express middleware — production paywall for Stacks Bitcoin micropayments
Every project in this collection meets these criteria: no meaningful activity for 365+ days, under 30 stars (or explicitly archived/deprecated in text). The list is computed from our live crawl of 1.5k+ open-source repositories — it is not hand-picked or pay-to-list.
The underlying data (stars, activity, new repositories) is refreshed by our crawler on a weekly cycle, so collections re-compute with each deployment.
Submit it from the Submit page. Once crawled and classified, it automatically qualifies for every collection whose criteria it meets.