x402
Actively maintained
35 linking domains
Emerging
- For
- Developers building AI agents that pay for API calls in USDC on Base
- Activity
- Actively maintainedsite updated 5 weeks ago
- Used for
- pay for API calls in USDC on Base
- fetch HTTP 402 paid endpoints from Node.js or Python
- check wallet balance and send USDC from the CLI
- Publishes llms.txt, a file written for AI assistantsx402-ai-agent.space ↗
- Launched on Product Hunt on Aug 4, 2026Product Hunt ↗
Figure and bar: visits/mo, estimate · year: online since
- #1
Twilio
Sends and receives SMS, email, and voice messages through APIs and manages customer conversations with AI.
1.1MActiveFree plan2008 - #2
TestMu AI (Formerly LambdaTest)
Runs manual and automated Selenium, Playwright, Cypress and Appium tests on cloud browsers and real mobile devices, with test agents for generating tests.
370kActiveFrom $17/mo2017 - #3
Cursor
AI coding agent that writes code, runs tasks, and reviews pull requests autonomously or with human direction.
314kActiveFrom $8/mo2023 - #4
PostmanMCP · sign-in
Designs, tests, and manages APIs with integrated documentation, mocking, monitoring, and workflow automation.
202kActiveFrom $9/mo2013 - #5
AlchemyMCP · sign-in
Provides node RPC endpoints, indexed blockchain data APIs, and wallet and transaction APIs across about 100 chains.
174kActiveFrom $0.53 per use2017 - #6
TinyFishMCP · sign-in
Provides web search, content fetching, browser automation, and agent APIs for AI applications to access and interact with live web content.
150kActiveFrom $0.02 per use
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betaThree tools from the Atlas for the job you describe, each with what fits and what does not.
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Sign in to leave a noteWhat is x402?
Lets clients pay per API request in USDC on Base through the HTTP 402 response, with Node and Python SDKs. It is listed in the Atlas under Developer tools.
Who is x402 for?
Developers building AI agents that pay for API calls in USDC on Base
Do people use x402?
Emerging.
Is x402 still maintained?
Actively maintained: site updated 5 weeks ago.
What are alternatives to x402?
In Developer tools, by use: Twilio, TestMu AI (Formerly LambdaTest), Cursor, Postman, Alchemy, TinyFish.
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