402proto

open payment protocol
http 402 + usdc on @solana
62PYFGJj748KXcLk8thR8YkceMepuciZVRX88jPdpump

[402proto @x402proto]

$proto is live.

CA: 62PYFGJj748KXcLk8thR8YkceMepuciZVRX88jPdpump

402proto is built on a simple principle: paid apis should bill per call, not per month.

No signup. No api keys. No monthly bill. Every call is a signed usdc transfer on solana, settled in under two seconds.

Built for humans who want to pay only for what they use. Built for AI agents that need to call any api without a credit card.

Developer resources:

GitHub: https://t.co/ilXCaqqfvN
web: https://t.co/16oFDJQmJN

Settle per call.

[402proto @x402proto]

ai agents already call apis at machine speed. they spin up, ask one question, shut down. they have no billing department. they sign no contracts. they read no renewal emails.

stripe was built for buyers who do all of those things.

402proto is built for the buyer that does none of them. http 402, usdc on solana, settled per call.

https://t.co/16oFDJQmJN

[402proto @x402proto]

one round trip. one signed transaction. one receipt.

$ pip install 'proto402[chain]'
$ export PROTO402_WALLET=...
$ proto402 call https://t.co/Wtc42F1O9H price.get --symbol SOL/USD --max 0.005

payload: { price: 142.31, conf: 0.04, ts: 1747... }
tx: 5j7B...kQz4

https://t.co/16oFDJQmJN

[402proto @x402proto]

@DavidP898089218 x doesn't open community creation anymore.

[402proto @x402proto]

the api economy was sold to humans for thirty years. monthly plans, dashboards, keys, renewal emails.

agents don't read renewal emails.

so we built the rail underneath. http 402 + usdc on solana, settled per call. four sdks: python, typescript, rust, mcp. one envelope, one wallet.

v0.2 ships real on-chain settle - not a stub. 6 providers live, 19 wired and waiting.

every call is a signed transaction with a queryable on-chain receipt.

https://t.co/16oFDJQmJN

[402proto @x402proto]

Dex paid

https://t.co/jr4bjbf7Ub

[402proto @x402proto]

@inye3000 already done

[402proto @x402proto]

402proto v0.1 is open source.

— mit license
— spec v0.1 frozen
— python + typescript + rust + mcp
— six provider integrations
— devnet end-to-end works today

http 402 + usdc on solana.

https://t.co/EAzy3A9c7I

[402proto @x402proto]

CA in gh

https://t.co/alhFXODOpi

[402proto @x402proto]

tokens locked

https://t.co/fdpPoD62bY

[402proto @x402proto]

402proto v0.1 - repo tour:

spec/ http 402 envelope + signing rules
sdk-py/ python client `proto402`
sdk-ts/ typescript client `@402proto/sdk`
router-rs/ rust quote router with retry + failover
mcp-server/ node mcp for claude code + cursor
examples/ pyth, jupiter, helius, claude, mcp setup

mit license. devnet end-to-end today. mainnet settle in v0.2.

https://t.co/ilXCaqqfvN

[402proto @x402proto]

how a 402proto call works:

agent quotes. agent signs. router pays. provider returns the payload.

one round trip. one transaction. one receipt.

no escrow. no monthly bill. no key in a dashboard.

https://t.co/XOhyT8gXbQ

[402proto @x402proto]

@MetaMask @solana card on solana is one layer. 402proto strips one more — agent wallet sends usdc-spl directly per call, no card issuer, no rails between.

http 402. mit envelope. https://t.co/EAzy3A9c7I

[402proto @x402proto]

https://t.co/OG8o9CQbnv