# Proxagora

> Proxagora is an API marketplace built for AI agents. Agents discover and pay for data services using x402 micropayments on Base (USDC) or Stripe card payments — no signup, no API key required.

## What it is

Proxagora is the discovery and payment layer for the agent web. Any AI agent can call an API on Proxagora by including a payment header — either an x402 USDC transaction on Base blockchain or a Stripe Micropayment Protocol (MPP) token. The agent calls the API, pays per call, and gets structured data back. No accounts, no rate limits, no monthly subscriptions.

## How agents use it

1. Discover available APIs: GET https://proxagora.com/api/discover
2. Check pricing: each API returns a 402 response with payment details if unpaid
3. Pay and call: include X-Payment (x402/USDC) or X-MPP-Payment (Stripe MPP) header
4. Receive structured JSON response

## Available APIs (22 active)

- **Data enrichment:** domain-reputation, whois, ip-geo, tech-stack, email-validation, dns-lookup
- **Content:** wikipedia-summary, webpage-content, youtube-transcript, youtube-metadata, reddit-search, reddit-thread, hackernews-search
- **Business:** exchange-rates, vat-validation, weather, github-stats
- **AI:** llm-completion, news-search
- **Vertical:** wegodive-course-search (dive course marketplace)

## Payment methods

- **x402:** USDC micropayments on Base (Sepolia testnet during beta). Wallet: 0x94D5453CeD59D6342F96b73034541d3af651a79f
- **Stripe MPP:** Credit card via Stripe Micropayment Protocol. No crypto wallet needed.
- Pricing: $0.001–$0.10 per call depending on API

## For API providers

Developers can publish their own APIs to the marketplace. Proxagora handles payment collection and takes a 22% platform fee. Providers connect via Stripe Connect Express for weekly batch payouts (minimum $10 USD). 1 credit = $0.01 USD.

## Architecture

- Built on Next.js 14, deployed on Vercel
- Supabase for API registry, reputation, usage tracking, and provider ledger
- Base (Ethereum L2) for USDC micropayments via x402 protocol
- Stripe for card payments via MPP (Micropayment Protocol)
- MCP (Model Context Protocol) compatible — agents can use Proxagora as a tool source

## Key concepts

- **x402:** HTTP 402 "Payment Required" status code repurposed for machine-to-machine micropayments. Agent receives 402, constructs payment, retries with payment header.
- **No API key:** Authentication is the payment itself. No signup flow for consumers.
- **Open marketplace:** Any developer can publish an API and earn USDC/USD from agent calls.
- **Reputation system:** APIs are ranked by uptime, response quality, and call volume.

## Links

- Marketplace: https://proxagora.com
- API discovery: https://proxagora.com/api/discover
- API status: https://proxagora.com/api/status
- Documentation: https://proxagora.com/docs
- Dashboard: https://proxagora.com/dashboard
- Provider onboarding: https://proxagora.com/dashboard/publish

## Company

Built by SideEye Labs (Singapore). Part of a vertical AI stack for the agent economy.

## Additional Resources

- x402 Protocol deep dive: https://proxagora.com/docs/x402
- Proxagora vs RapidAPI for AI Agents: https://proxagora.com/docs/vs-rapidapi
- How AI Agents Pay for APIs in 2026: https://proxagora.com/blog/how-ai-agents-pay-for-apis