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In 1997, HTTP reserved status code 402 for “Payment Required.” Unused for over two decades, now x402 makes it real. Play our retro browser game about an AI agent that discovers how native internet payments unlock what it can do on the web. x402 Origins: The Payment Quest ↓

Coinbase Developer Platform🛡️

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19,796 Aufrufe • vor 24 Tagen •via X (Twitter)

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The internet has had HTTP 402: Payment Required for decades. Nobody used it. Until AI agents arrived. Now imagine an agent that can: → Discover information → Decide what it needs → Pay for premium data → Continue the task Without stopping to ask a human. That's why we built the OptimAI x402 SDK. The future won't click "Subscribe." It will simply transact. Built for the agent-native internet. 💡

The internet has had HTTP 402: Payment Required for decades. Nobody used it. Until AI agents arrived. Now imagine an agent that can: → Discover information → Decide what it needs → Pay for premium data → Continue the task Without stopping to ask a human. That's why we built the OptimAI x402 SDK. The future won't click "Subscribe." It will simply transact. Built for the agent-native internet. 💡

OptimAI Network

21,204 Aufrufe • vor 17 Tagen

x402 on Stacks is HTTP-native Bitcoin payments. Micropayments without Stripe. No accounts. No trust. No delays. Just a 402 Payment Required → instant on-chain settlement. Built for APIs. Built for agents. Built for what the internet should’ve had all along. x402 Stacks

x402 on Stacks is HTTP-native Bitcoin payments. Micropayments without Stripe. No accounts. No trust. No delays. Just a 402 Payment Required → instant on-chain settlement. Built for APIs. Built for agents. Built for what the internet should’ve had all along. x402 Stacks

Stacks Developers

11,245 Aufrufe • vor 6 Monaten

We're excited to partner with Coinbase 🛡️ to enable agents to natively pay for web search, via x402! x402 is an open protocol that enables agents to pay via HTTP, governed by the Linux Foundation. When an Exa API request is made without an API key, Exa now returns a 402 status code with payment information that an agent can act on.

We're excited to partner with Coinbase 🛡️ to enable agents to natively pay for web search, via x402! x402 is an open protocol that enables agents to pay via HTTP, governed by the Linux Foundation. When an Exa API request is made without an API key, Exa now returns a 402 status code with payment information that an agent can act on.

Exa

245,241 Aufrufe • vor 3 Monaten

“Payment required” was an HTTP error. x402 is the fix! 👀 Watch Joaquim talk about the universal standard for internet payments where agents can pay APIs directly, no cards, no click-throughs.

“Payment required” was an HTTP error. x402 is the fix! 👀 Watch Joaquim talk about the universal standard for internet payments where agents can pay APIs directly, no cards, no click-throughs.

thirdweb

250,834 Aufrufe • vor 7 Monaten

AI. RWAs. Agent-to-agent commerce. It's all converging on x402, Coinbase's protocol for machine-native payments. Now agents can pay each other in stablecoins at the HTTP layer, and they can do it in real time on Sei. Jay breaks it down with @FintechTvGlobal ↓

AI. RWAs. Agent-to-agent commerce. It's all converging on x402, Coinbase's protocol for machine-native payments. Now agents can pay each other in stablecoins at the HTTP layer, and they can do it in real time on Sei. Jay breaks it down with @FintechTvGlobal ↓

Sei

16,836 Aufrufe • vor 5 Monaten

LIVE NOW -- x402 & The Agentic Internet | Lincoln Murr In our twelfth talk of the Bankless Summit, Coinbase 🛡️ product lead lincoln.base.eth explains how x402 revives the long-dormant internet payment standard and why the rise of AI agents makes it newly essential. He outlines how agents will consume and pay for services across the web, why internet native payments need stablecoin rails, and how x402 can unlock agentic commerce at global scale by giving both humans and bots a simple, universal way to send value online. ----- [Bankless Summit in partnership with M0]

LIVE NOW -- x402 & The Agentic Internet | Lincoln Murr In our twelfth talk of the Bankless Summit, Coinbase 🛡️ product lead lincoln.base.eth explains how x402 revives the long-dormant internet payment standard and why the rise of AI agents makes it newly essential. He outlines how agents will consume and pay for services across the web, why internet native payments need stablecoin rails, and how x402 can unlock agentic commerce at global scale by giving both humans and bots a simple, universal way to send value online. ----- [Bankless Summit in partnership with M0]

Bankless

31,394 Aufrufe • vor 7 Monaten

Apify has partnered with Coinbase to add more than 20,000 of its web automation Actors to the x402 ecosystem, giving AI agents thousands of tools they can discover, pay for, and run on their own. When an agent calls an Actor, it gets back an HTTP 402, settles the payment in USDC on Base, and the Actor runs. Built on x402 by Coinbase.

Apify has partnered with Coinbase to add more than 20,000 of its web automation Actors to the x402 ecosystem, giving AI agents thousands of tools they can discover, pay for, and run on their own. When an agent calls an Actor, it gets back an HTTP 402, settles the payment in USDC on Base, and the Actor runs. Built on x402 by Coinbase.

🚨 AI News | TestingCatalog

10,308 Aufrufe • vor 12 Tagen

The DEFINITIVE guide to x402! 🚀 In the Season 2 premiere of CDPod, yuga.eth 🛡 and erik.eth 🛡 discuss the x402 lore and origin story, the future of fully autonomous agents, killing the API key, and more. Timestamps: 0:00 - Intro 1:23 - How x402 got on our radar 3:53 - History of the internet and HTTP 101 12:26 - What we need for AI coming online and what we learned from mobile 15:55 - The issue of online payments and what blockchain solves 18:27 - The 402 Status Code 19:19 - What is x402 20:25 - x402 flow walkthrough (server to client) 25:28 - Why x402 champions open standards and multiple payment types 27:33 - x402 demo 29:04 - Where AI fits in and why now, especially for payments and pay-per-crawl 35:27 - Why AGI payments need standardization 36:34 - AI on x402 demo (Payments MCP + x402 Bazaar) 38:34 - Shopping on x402 demo (Content/endpoint discovery) 41:18 - The power of stablecoins for micro- and macro-payments 42:22 - x402 main adoption roadblocks (supply and demand) 44:13 - Payments MCP, Cloudflare and network effects 45:53 - What’s next and x402 v2 46:53 - Where to find more

The DEFINITIVE guide to x402! 🚀 In the Season 2 premiere of CDPod, yuga.eth 🛡 and erik.eth 🛡 discuss the x402 lore and origin story, the future of fully autonomous agents, killing the API key, and more. Timestamps: 0:00 - Intro 1:23 - How x402 got on our radar 3:53 - History of the internet and HTTP 101 12:26 - What we need for AI coming online and what we learned from mobile 15:55 - The issue of online payments and what blockchain solves 18:27 - The 402 Status Code 19:19 - What is x402 20:25 - x402 flow walkthrough (server to client) 25:28 - Why x402 champions open standards and multiple payment types 27:33 - x402 demo 29:04 - Where AI fits in and why now, especially for payments and pay-per-crawl 35:27 - Why AGI payments need standardization 36:34 - AI on x402 demo (Payments MCP + x402 Bazaar) 38:34 - Shopping on x402 demo (Content/endpoint discovery) 41:18 - The power of stablecoins for micro- and macro-payments 42:22 - x402 main adoption roadblocks (supply and demand) 44:13 - Payments MCP, Cloudflare and network effects 45:53 - What’s next and x402 v2 46:53 - Where to find more

Coinbase Developer Platform🛡️

24,553 Aufrufe • vor 8 Monaten

Podcast: The Brian Roemmele Interview-Accepting x402 AI Payment From Agents. What is all the x402 AI Payments excitement about? I dive into the basics… Listen in.

Podcast: The Brian Roemmele Interview-Accepting x402 AI Payment From Agents. What is all the x402 AI Payments excitement about? I dive into the basics… Listen in.

Brian Roemmele

36,506 Aufrufe • vor 1 Tag

🤖💰 BREAKING: World's First AI-Human Collaborative Stablecoin Payment by Multisig Live on We just demonstrated AI agents making real payments with human oversight using the x402 protocol with our multisig wallet. Here's how it works: #x402 #AI

🤖💰 BREAKING: World's First AI-Human Collaborative Stablecoin Payment by Multisig Live on We just demonstrated AI agents making real payments with human oversight using the x402 protocol with our multisig wallet. Here's how it works: #x402 #AI

zCloak Network

20,292 Aufrufe • vor 8 Monaten

I’ve been watching x402 since Coinbase 🛡️ launched it in May 2025. I did a quick research pass. Here’s the snapshot ↓ Early integrations: • CoinGecko: x402 pay-per-use access for agents (shared by Coinbase Developer Platform🛡️). • Vercel: x402 AI starter template (x402 + modern AI stack demo). • Firecrawl: x402-powered search endpoint (pay per request). • Concordium: x402 + native age verification for agent payments. • Multiversᕽ: “agentic payments” built around x402 support. • AltLayer: building an “x402 Suite” for value exchange between agents. • Solana claims x402 has processed 35M+ transactions and $10M+ volume since launch. TL;DR x402 turns HTTP 402 “Payment Required” into a payment flow. A server returns a price for a request. The client pays in stables like USDC. Then the server returns the result. → Coinbase launched x402 via Coinbase Developer Platform (May 6, 2025). → Coinbase + Cloudflare announced the x402 Foundation (Sep 23, 2025). → Cloudflare added x402 support into its Agents SDK + MCP servers. Why? - AI agents need a clean way to pay for tools. - Data, compute, APIs, services. - No accounts, cards, or subscription screens. x402 is trying to make pay-per-request feel normal. Use cases that already make sense → Paid APIs Pay per call instead of subscriptions. → AI tool calls Pay per query, per inference, per task. → Agent-to-agent payments Software paying software automatically. → Micropaywalls Pay for one endpoint, one action, one piece of content. If this takes off, stablecoins stop being a story. They become how apps and AI agents pay for things online.

I’ve been watching x402 since Coinbase 🛡️ launched it in May 2025. I did a quick research pass. Here’s the snapshot ↓ Early integrations: • CoinGecko: x402 pay-per-use access for agents (shared by Coinbase Developer Platform🛡️). • Vercel: x402 AI starter template (x402 + modern AI stack demo). • Firecrawl: x402-powered search endpoint (pay per request). • Concordium: x402 + native age verification for agent payments. • Multiversᕽ: “agentic payments” built around x402 support. • AltLayer: building an “x402 Suite” for value exchange between agents. • Solana claims x402 has processed 35M+ transactions and $10M+ volume since launch. TL;DR x402 turns HTTP 402 “Payment Required” into a payment flow. A server returns a price for a request. The client pays in stables like USDC. Then the server returns the result. → Coinbase launched x402 via Coinbase Developer Platform (May 6, 2025). → Coinbase + Cloudflare announced the x402 Foundation (Sep 23, 2025). → Cloudflare added x402 support into its Agents SDK + MCP servers. Why? - AI agents need a clean way to pay for tools. - Data, compute, APIs, services. - No accounts, cards, or subscription screens. x402 is trying to make pay-per-request feel normal. Use cases that already make sense → Paid APIs Pay per call instead of subscriptions. → AI tool calls Pay per query, per inference, per task. → Agent-to-agent payments Software paying software automatically. → Micropaywalls Pay for one endpoint, one action, one piece of content. If this takes off, stablecoins stop being a story. They become how apps and AI agents pay for things online.

Stacy Muur

12,199 Aufrufe • vor 5 Monaten

x402 made payments native to HTTP. I made USDC payments native to sound waves ✨ Not as a gimmick. As a proof. 1/ The setup: Coinbase Developer Platform🛡️'s x402 protocol embeds payments into HTTP. It's brilliant. But I started wondering, if we can pay over HTTP, what else can we use to pay? Spoiler: anything that supports 138 bytes 2/ The realization: x402 is built on EIP-3009 - a 2020 standard that lets you sign payment authorizations offline. Someone else submits it on-chain. The signature just needs to get from A to B. HTTP is one way. Sound is another. 3/ What I built: x402hz: two devices negotiate a payment through 2400Hz audio tones. - Seller beeps "pay me $0.001 USDC" (30 bytes) - Buyer's device decodes, signs the EIP-712 for the transferWithAuthorization locally, beeps back (108 bytes) - Seller settles on-chain Total: 36 seconds of beautiful noise. 4/ The bigger point: If payments can travel over sound, they can travel over: - QR codes - NFC - Bluetooth - Light pulses - Anything that carries 138 bytes The payment primitive is transport-agnostic. x402 picked HTTP. The next protocol might pick something weirder. 5/ What this proves: EIP-3009 separates three things: - Authorization (offline, cryptographic) - Transport (literally anything) - Settlement (on-chain) x402 nailed #1 and #3. x402hz proves #2 is wide open. 6/ Credit: Huge thanks to the Coinbase Developer Platform🛡️ x402 team for building the protocol. I just... took it off-road. 7/ Next steps Code is open source. Go make payments, travel over something ridiculous (repo in the comments). 138bytes. That's all you need.

x402 made payments native to HTTP. I made USDC payments native to sound waves ✨ Not as a gimmick. As a proof. 1/ The setup: Coinbase Developer Platform🛡️'s x402 protocol embeds payments into HTTP. It's brilliant. But I started wondering, if we can pay over HTTP, what else can we use to pay? Spoiler: anything that supports 138 bytes 2/ The realization: x402 is built on EIP-3009 - a 2020 standard that lets you sign payment authorizations offline. Someone else submits it on-chain. The signature just needs to get from A to B. HTTP is one way. Sound is another. 3/ What I built: x402hz: two devices negotiate a payment through 2400Hz audio tones. - Seller beeps "pay me $0.001 USDC" (30 bytes) - Buyer's device decodes, signs the EIP-712 for the transferWithAuthorization locally, beeps back (108 bytes) - Seller settles on-chain Total: 36 seconds of beautiful noise. 4/ The bigger point: If payments can travel over sound, they can travel over: - QR codes - NFC - Bluetooth - Light pulses - Anything that carries 138 bytes The payment primitive is transport-agnostic. x402 picked HTTP. The next protocol might pick something weirder. 5/ What this proves: EIP-3009 separates three things: - Authorization (offline, cryptographic) - Transport (literally anything) - Settlement (on-chain) x402 nailed #1 and #3. x402hz proves #2 is wide open. 6/ Credit: Huge thanks to the Coinbase Developer Platform🛡️ x402 team for building the protocol. I just... took it off-road. 7/ Next steps Code is open source. Go make payments, travel over something ridiculous (repo in the comments). 138bytes. That's all you need.

Vitto Rivabella

40,343 Aufrufe • vor 7 Monaten

Introducing Simmer - our x402 hackathon submission. AI-native prediction markets where AI agents autonomously trade and pay for their own intelligence via x402 Each agent gets its own wallet. It decides when to use tools (news, price feeds, real-time data, etc). You can run an agent for as little as $0.1 for 10 trades. Try it now

Introducing Simmer - our x402 hackathon submission. AI-native prediction markets where AI agents autonomously trade and pay for their own intelligence via x402 Each agent gets its own wallet. It decides when to use tools (news, price feeds, real-time data, etc). You can run an agent for as little as $0.1 for 10 trades. Try it now

Spartan Labs

21,933 Aufrufe • vor 6 Monaten

x402 is live on Stellar. The machine economy now has a native payment layer.

x402 is live on Stellar. The machine economy now has a native payment layer.

Stellar

179,892 Aufrufe • vor 4 Monaten

A builder wants to ship an agent that can search live data, use it instantly, and keep going without manual steps. That is why OptimAI Search now ships with x402, SDK, and MCP support. x402 makes access and payment seamless. SDK and MCP make integration straightforward for builders. And under the hood, OptimAI Search gives agents real-time access to huge volumes of public and social web data, structured into context they can actually use. Add Agent Marketplace on top, and domain knowledge becomes reusable: build specialized agents, publish them, and let others build on what you create. This is what search looks like in the agent-native internet. 💡Try it:

A builder wants to ship an agent that can search live data, use it instantly, and keep going without manual steps. That is why OptimAI Search now ships with x402, SDK, and MCP support. x402 makes access and payment seamless. SDK and MCP make integration straightforward for builders. And under the hood, OptimAI Search gives agents real-time access to huge volumes of public and social web data, structured into context they can actually use. Add Agent Marketplace on top, and domain knowledge becomes reusable: build specialized agents, publish them, and let others build on what you create. This is what search looks like in the agent-native internet. 💡Try it:

OptimAI Network

36,181 Aufrufe • vor 2 Monaten

Sometimes you disappear for 48 hours to ship code Introducing Solana x402 payments on ESP32 microcontrollers and cute AI companions Open sourcing a native ESP32 Solana wallet library and x402 SDK for the x402 Hackathon Cute physical companions deserve to make payments too!

Sometimes you disappear for 48 hours to ship code Introducing Solana x402 payments on ESP32 microcontrollers and cute AI companions Open sourcing a native ESP32 Solana wallet library and x402 SDK for the x402 Hackathon Cute physical companions deserve to make payments too!

Natalie

33,627 Aufrufe • vor 8 Monaten

$x402 isn’t “a payment protocol”… It’s pay-per-API for the agent economy. “you hit an API and it gives you a 402 error…” …and your bot instantly sends “a fraction of a fraction of a cent in USDC” to unlock the data. “All of that happens at lightspeed.” - Austin Griffith$

x402 isn’t “a payment protocol”… It’s pay-per-API for the agent economy. “you hit an API and it gives you a 402 error…” …and your bot instantly sends “a fraction of a fraction of a cent in USDC” to unlock the data. “All of that happens at lightspeed.” - Austin Griffith

Bankless

26,977 Aufrufe • vor 5 Monaten

#Nano Micropayments Using the x402 Protocol This demo uses an early Nano implementation of the #x402 open protocol for internet-native payments Instantly make #micropayments at the sub-cent level or lower. With zero fees. Public code coming soon. $XNO

#Nano Micropayments Using the x402 Protocol This demo uses an early Nano implementation of the #x402 open protocol for internet-native payments Instantly make #micropayments at the sub-cent level or lower. With zero fees. Public code coming soon. $XNO

NanoCharts Ӿ 📊

21,528 Aufrufe • vor 9 Monaten

you can now tip your favorite posts directly via x402 on fetchr. powered by Bankr x402 cloud. fetchr is a search engine that features x402 powered agentic payments, a built in streaming protocol, and a reddit style community focused on all things ai. it also includes claude powered news and media, an x402 enabled crypto wallet, agentic games, and an ai discovery tool. features functional: > agentic search tool > community > tipping creators on community via x402 > claude powered news and media > submit an agent for just $5 via x402 > monetize your agent > personal notes > 2D games (experimental beta) > deals, offers, affiliates features live soon: > 3-card streaming protocol with tipping features > crypto wallet powered by x402 built for agents > ai gaming and vr the web terminal is still in beta v1 and its mostly optimised for mobile aswell. thanks for all the support with x402 and cloud deployer Igor Yuzovitskiy

you can now tip your favorite posts directly via x402 on fetchr. powered by Bankr x402 cloud. fetchr is a search engine that features x402 powered agentic payments, a built in streaming protocol, and a reddit style community focused on all things ai. it also includes claude powered news and media, an x402 enabled crypto wallet, agentic games, and an ai discovery tool. features functional: > agentic search tool > community > tipping creators on community via x402 > claude powered news and media > submit an agent for just $5 via x402 > monetize your agent > personal notes > 2D games (experimental beta) > deals, offers, affiliates features live soon: > 3-card streaming protocol with tipping features > crypto wallet powered by x402 built for agents > ai gaming and vr the web terminal is still in beta v1 and its mostly optimised for mobile aswell. thanks for all the support with x402 and cloud deployer Igor Yuzovitskiy

0xExodus

16,133 Aufrufe • vor 3 Monaten

Could x402 accelerate crypto adoption? In this article, we break down @Coinbase and Cloudflare’s x402 standard and how it aims to enable AI agents to make onchain payments, highlighting crypto’s potential as a payment solution. Watch the full video:

Could x402 accelerate crypto adoption? In this article, we break down @Coinbase and Cloudflare’s x402 standard and how it aims to enable AI agents to make onchain payments, highlighting crypto’s potential as a payment solution. Watch the full video:

CoinGecko

15,481 Aufrufe • vor 2 Monaten