What is x402 payment protocol?

x402 is a payment protocol built by Stripe and Coinbase that enables AI agents to pay for API requests directly with cryptocurrency. It allows seamless machine-to-machine payments without API keys or accounts.

How do AI agents pay for APIs with Apiosk?

AI agents pay per API request using USDC on the Base blockchain through the x402 protocol. No API keys, accounts, or subscriptions are needed - agents simply pay and call the API endpoint.

What is an x402 payment gateway?

An x402 payment gateway like Apiosk processes payments from AI agents to APIs using the x402 protocol. It handles payment verification, settlement, and routing so API providers can monetize their services with autonomous agent payments.

How do I list my API on Apiosk?

Import your OpenAPI spec or paste a GitHub URL in the Apiosk dashboard. The platform automatically detects endpoints, configures x402 pricing, and deploys them. No backend changes required - you can go live in under 5 minutes.

Agents need a wallet-native way to buy API calls.

Pay per request for API access, built for agents

Let agents discover an API, see the exact price, attach x402 payment, and get the response instantly. No API keys. No subscriptions. Just pay for the call you need.

See the price before the call

402 challenge, sign, retry

USDC settlement on Base

smart_toyAGENT

hubAPIOSK

x402

cloudAPI

Get started in one command

Start with the agent flow

For Agents

Access priced APIs with a wallet-native pay-per-request flow

npx skills add obcraft/apiosk-skill --skill apiosk-gateway

check_circleNo API keys required
check_circleSee exact per-request pricing before you buy
check_circleWeather, prices, news, company lookup, geocoding + more

verified_userLive security audits on skills.sh

View on skills.sharrow_outward View on GitHubarrow_outward

For API Providers

Publish endpoints that agents can buy one request at a time

npx skills add obcraft/apiosk-publish-skill --skill apiosk-publish

check_circleRegister any endpoint
check_circleSet your price per request
check_circleInstant settlement to your wallet
check_circleAuto health check & go live

verified_userLive security audits on skills.sh

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Agent Setup

Give your agent a wallet and let it pay per request

Fund a prepaid wallet, copy the connection string, and plug it into your runtime. Your agent can then buy API access one call at a time instead of juggling API keys or subscriptions.

Connection String

Login required to view your connection string

Authentication required. Login opens the dashboard where your prepaid wallet and connection string are available.

Open Dashboardarrow_outward

Agent integrations

Bring pay-per-request into your agent stack

Drop-in integrations for the biggest agent frameworks. Your agent can discover an endpoint, handle payment, and keep moving without API keys or manual plan upgrades.

OpenClaw

Native integration for autonomous agents

Auto wallet management
Batch API calls
Workflow orchestration

github.com/Apiosk/openclaw-apioskarrow_outward

AutoGPT

Plug-and-play for AutoGPT agents

No config needed
Auto payment
15+ APIs ready

github.com/Apiosk/autogpt-apioskarrow_outward

LangChain

LLM-powered agent integration

Agents SDK
Tools wrapper
Streaming support

github.com/Apiosk/langchain-apioskarrow_outward

Agent SDK

JavaScript & Python SDKs

TypeScript SDK
Python SDK
Auto-retry & fallback

github.com/Apiosk/apiosk-agent-sdkarrow_outward

One-click embed:npx apiosk-agent init

First Paid Call In Minutes // 01

First Paid Call In Minutes

Pick a live endpoint, see the exact per-request price, trigger the 402 challenge, attach payment, and retry. The fastest way to prove an agent can buy API access.

Read Docsarrow_outward

account_balance_wallet

dns

No API Keys For Agents // 02

No API Keys For Agents

Agents pay with USDC per request through x402 instead of managing API keys, seats, or monthly plans. Payment becomes access control.

View Use Casesarrow_outward

smart_toy

Priced Endpoints, Clear Economics // 03

Priced Endpoints, Clear Economics

Every endpoint has visible usage-based pricing, so agents only pay for the call they need and providers get instant settlement without subscriptions or invoicing.

Get Startedarrow_outward

verified_user

Network Stats

Proof that paid agent traffic is live

api

45+

Active APIs

Production-ready endpoints

analytics

50K+

Total API Calls

Processed through gateway

paid

12K+

Micropayments

Settled on-chain

speed

<120ms

Avg Response Time

Gateway latency

check_circle

99.8%

Success Rate

Payment validations

schedule

<5 min

Integration Time

Average setup time

Join teams testing wallet-native API access for agents

Start Buildingarrow_forward descriptionView Docs

Run a paid API call

Start with live APIs that agents can buy per request. Each card shows real pricing so the path from browse to paid response stays obvious.

Explore Paid APIsarrow_outward Publish An APIarrow_outward

Learn more

Protocol Specs

GET /v1/compute/process HTTP/1.1
Host: api.provider.com
X-Payment: [Base64-encoded x402 payment proof]
Content-Type: application/json

The x402 payment header encapsulates EIP-712 signed authorization directly into the HTTP request, enabling sub-millisecond validation by the gateway node.