Roadmap

Development Roadmap

API20 is an early experimental discovery and testing layer. This roadmap outlines planned phases — timelines are indicative and subject to change.

Phase 1 · Current

Website, docs, terminal preview

Launch api20.xyz with project overview, developer documentation, interactive terminal preview, registry preview, and public roadmap.

Phase 2 · Completed

Registry schema and x402 metadata

Public registry.json, API detail pages, structured metadata fields, curl and HTTP 402 examples, and GitHub documentation repo.

Phase 3 · Planned

Real HTTP 402 parser research

Probe real endpoints and parse x402 payment requirement fields including network, asset, amount, scheme, and resource metadata.

Phase 4 · Planned

MCP-ready API metadata

Agent tool documentation, payment-aware metadata, and future MCP server compatibility research. No live MCP server today.

Phase 5 · Planned

Public x402 API registry submission system

Enable API builders to submit and list x402-compatible endpoints with verified pricing, network, and MCP-ready status.

Research · Builder Codes

Builder Codes / ERC-8021 Attribution Research

Explore how Builder Codes can be represented in API20 registry metadata to help identify apps, APIs, and agent workflows associated with x402 traffic on Base. Not live settlement integration. See Builder Codes Research.

Phase 6 · Research

MPP / Tempo compatibility research

Track Machine Payments Protocol and Tempo models as future research — not a live feature. See MPP / Tempo Research.

Phase 7 · Future

Real CLI package

Publish an installable CLI tool for scan, inspect, registry, and MCP metadata preview. Not live yet.

Phase 8 · Future

Agent mode and automation support

Structured agent mode output for AI tools and automation pipelines — autonomous discovery and payment flow preparation.

Project status

API20 is in Phase 2–3. Phase 2 (registry metadata layer) is complete as a demo/static preview. The installable CLI package, real payment execution, official MCP server, Builder Code settlement integration, and MPP/Tempo integration are not live.

Disclaimer: API20 is an independent experimental project. It is not affiliated with Coinbase, Base, Coinbase Developer Platform, Tempo, Stripe, or any official x402, MCP, or MPP organization. References are for ecosystem compatibility, research, and educational purposes only.