Algorand x402 integration project

Algorand x402 Protocol — Complete Integration and developer toolings and resources for x402 V1 and V2 in Typescript and Python

Summary:

GoPlausible has delivered the complete x402 payment protocol integration for Algorand, making Algorand one of only three blockchains (alongside Solana and Base/EVM) with full x402 support. This work positions Algorand as a first-class citizen in the emerging AI agent-to-agent payment rails ecosystem—foundational infrastructure for the agentic future.

Deliverables Completed:

1. Core Protocol and Specifications:

   • Contribution to Algorand x402 Specification (merged into Coinbase spec) : specification
   • Reference Implementation (V2) : implementation
   • Reference Implementation (V2) PR : PR

2. Live Infrastructure:

   • Multi-chain Facilitator (Algorand Mainnet + Testnet/Solana/Base) : facilitator
   • Facilitator API Documentation: API Docs
   • Supported Networks: supported networks
   • Live Demo: live demo

3. TypeScript SDK (npm) — 9 Packages:

   • @x402-avm/core | Framework-agnostic core logic: npm
   • @x402-avm/avm | Algorand-specific mechanisms: npm
   • @x402-avm/extensions | Bazaar extension: npm
   • @x402-avm/paywall | Ready-to-use paywall UI: npm
   • @x402-avm/next | Next.js middleware: npm
   • @x402-avm/express | Express middleware: npm
   • @x402-avm/hono | Hono middleware (edge): npm
   • @x402-avm/fetch | Fetch client: npm
   • @x402-avm/axios | Axios client: npm

4. Python SDK (PyPI)

   • x402-avm: PyPI
   • Modular installation options:
     • x402-avm[all] — Full installation
     • x402-avm[avm] — Algorand mechanism only
     • x402-avm[fastapi] — FastAPI server middleware
     • x402-avm[flask] — Flask server middleware
     • x402-avm[httpx] — HTTPX client
     • x402-avm[requests] — Requests client
     • x402-avm[evm] / x402-avm[svm] — Multi-chain support

5. Documentation Hub:

   • Complete Documentation and Examples: Documentation
   • Includes TypeScript and Python examples for: Core, Mechanism, Extensions, Paywall, Express, Hono, Next.js, FastAPI, Flask, Fetch, Axios, HTTPX, Requests

6. Legacy V1 Packages (Maintained):

   • x402-avm
   • x402-avm-express
   • x402-avm-hono
   • x402-avm-next
   • x402-avm-fetch
   • x402-avm-axios

7. Agent skills added to Algorand DevRel repository:

   • DevRel Repository

Deliverables Summary:

• Live Infrastructure: 2
• TypeScript Packages (V2): 9
• Python Package (V2): 1 (+6 extras)
• Legacy V1 Packages: 6
• Documentation and Examples: 18+

Impact and Strategic Value:

Algorand's Position in Agentic AI

• One of only 3 chains with complete x402 support (Algorand, Solana, Base)
• Native support for AI agent payments — critical infrastructure for autonomous systems
• HTTP 402 standard compliance — seamless web integration without custom protocols
• Sub-second finality — Algorand's speed makes it ideal for micropayment use cases

Developer Experience:

• 9 TypeScript packages published on npm with full type support
• 1 Python package with 6 modular installation options
• Comprehensive documentation and example code covering all integration patterns
• Agent skills for x402 covering end-to-end developer scenarios and x402 knowledge
• Working examples for every major web framework in Typescript and Python (Express, Hono, Next.js, FastAPI, Flask)
• Both server middleware and client libraries — complete end-to-end support
• Dedicated facilitator + Bazaar endpoints

Open Source Commitment:

All deliverables are fully open source under permissive licenses, ensuring the Algorand community can build upon this foundation without restrictions.

Operational Fee Abstraction Cost Note:

The GoPlausible facilitator abstracts transaction fees for both merchants and payers, and therefore for each x402 transaction, GoPlausible sponsors:

This design choice maximizes adoption but means the facilitator operates at a continuous cost with no direct revenue model. The facilitator + Bazaar is a public good for the Algorand ecosystem.

Links:

• Website: goplausible.com
• GitHub: github.com/GoPlausible
• Twitter: twitter.com/GoPlausible

Contact

Mohammad Ghiasi (MG) GoPlausible's Co-founder and Technology Architect Twitter: @emg110

Proposal Funded!

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About the team GoPlausible has been a consistent Algorand builder since 2022, with founders contributing to the ecosystem since 2020. We began with the PLAUSIBLE Protocol—bringing W3C DIDs and Verifiable Credentials to Algorand—and have since expanded to lead Algorand's AI integration story.

Our Algorand Remote MCP, operational since 2024, now serves 1,000+ active users. We continue to deliver across the full AI stack: Algorand GPT, Algorand MCP, Algorand Agency, A2A protocol, and AP2 extension integration.

Additional Info How these grant resources will be used:

• Hardware purchase for continuation of contributions and delivering cutting-edge AI tech integrations for Algorand.
• R&D, development, open sourcing, and improvement of the Algorand Agency platform.
• Operational fee abstraction costs for Algorand facilitator.
• Hosting and maintenance of free and open-source services for the Algorand ecosystem.
• Continuity of providing and contributing to the integration of other AI and Agentic payment protocols for Algorand.

Adoption Metrics

• All Algorand developers and merchants
• All Algorand marketing campaigns, hackathons, and workshops on x402
• Algorand presentations and POCs cheered by tech giants such as Google