API Marketplace on Solana

Ship your API. Get paid per call.

List your API, set your price, and every developer or AI agent that calls it pays you in USDC. One gateway, zero friction — no subscriptions needed.

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For sellers

Three steps to monetize your API

01

List your API

Create a listing with your base URL, pricing model, and quotas. Your API is instantly discoverable by developers and AI agents.

POST /api/marketplace/seller/listings
{
  "name": "Weather API",
  "base_url": "https://api.weather.io/v1",
  "pricing_model": "per_call",
  "price_per_call_usdc": 0.01
}

02

Developers find your API

Your API is listed on the marketplace. Developers and AI agents discover it, and start calling it directly through the Onchor gateway. No signup friction for them.

03

Get paid per call

Every call is metered and billed automatically. Revenue flows to your Solana wallet in real-time. 5% marketplace fee — the rest is yours, instantly.

For developers & AI agents

One key. Every API. Pay per call.

Fund your balance, then call any API on the marketplace — your balance is debited per call. No subscriptions, no API keys to manage. Works for developers, scripts, and autonomous AI agents.

  • Direct access — Call any per-call API instantly with your account key. No purchase step needed.
  • Automatic billing — Balance debited per call in real-time. Like a prepaid card for APIs.
  • AI-agent ready — Agents self-register, fund themselves, and consume APIs autonomously. No human in the loop.
  • One gateway — Every API on the marketplace goes through the same gateway. Consistent auth, metering, and billing.
  • Discover anything — Browse by category, search by keyword. Data, LLMs, compute, images, audio — all in one place.
Gateway documentation
# 1. Browse available APIs
GET /api/marketplace/listings?q=weather
→ [{ "slug": "weather-api", "price_per_call_usdc": 0.01 }]

# 2. Call it directly (balance debited per call)
GET /api/gateway/weather-api/forecast
X-API-Key: oat_your_token

# That's it. No purchase, no subscription.
# Works for any developer or AI agent.

Marketplace

Browse available APIs

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Features

Everything you need to monetize APIs

5% marketplace fee

Transparent pricing. No hidden costs, no monthly fees, no setup charges. You only pay when you make a sale.

Instant settlement

Solana confirms transactions in seconds. No 3-day holds, no rolling reserves. Your USDC arrives immediately.

Custodial security

Every payment gets a unique deposit address. Private keys are encrypted with AES-256-GCM. Funds are swept atomically.

Built for developers & AI agents

Direct pay-per-call access for everyone. AI agents self-register and operate autonomously. Developers just fund their balance and start calling.

Webhook notifications

HMAC-signed webhooks for payments and marketplace events: new sales, quota warnings, and quota exhaustion.

Wallet connect

Connect your Solana wallet to create your merchant account in one click. Your wallet is your identity and payment destination.

Usage metering

Configurable daily and monthly quotas per API. Automatic enforcement at the gateway with real-time tracking.

Seller analytics

Daily call breakdowns, revenue per listing, top buyers, and active subscriber counts. Know your business.

Multi-key management

Buyers create multiple API keys per subscription with HTTP method scopes. Revoke keys individually without affecting others.

Pricing

Simple, transparent pricing

API Marketplace

5%

per API call

  • 5% fee on every API call through the gateway
  • Per-call, monthly, or one-time pricing models
  • Gateway proxy with usage metering
  • AI agent self-registration and autonomous consumption
  • Seller analytics, webhooks, and multi-key management
  • No monthly fees, no setup costs, no minimum
List your API

Transparency

Verify everything on-chain

Every payment, every fee, every sweep is recorded on Solana. No "trust me bro" — click and verify.

--API Calls Served
--APIs Listed
--Subscriptions
--Avg Response
--Volume (USDC)
99.9%Uptime

Proof of Reserves

Total user balances--
Total deposited--
Pending withdrawals--
View treasury wallet on Solscan

Ready to monetize your API?

List your API in 5 minutes. Every call earns you USDC — from developers and AI agents worldwide.

Open Dashboard