# x402 Published articles for x402. This is one page of public article previews, not the complete archive. Follow Next page to continue. Summaries are not the original full articles. ## Which AI Output Did the Human Actually Approve? Co-Signing AI Results on Base, $0.01 per Check DevFeed: [Which AI Output Did the Human Actually Approve? Co-Signing AI Results on Base, $0.01 per Check]() Original publisher: [Read original article]() Author: Artur Baranouski Published: 2026-10-23T07:04:07Z Content type: article Language: en Sources: [HackerNoon]() Topics: [human review](), [Artificial Intelligence](), [Open Source]() Tags: [agentic-ai](), [agents](), [ai](), [ai-infrastructure](), [base](), [blockchain](), [cryptography](), [decentralize-ai](), [decentralize-ai-hackathon](), [ethereum-attestation-service](), [free](), [manifest](), [open-source](), [signing](), [x402]() ### AI overview BuildProof records co-signatures for file hashes on Base, letting others check which exact bytes were approved and by whom. For AI output, its CLI creates a canonical JSON manifest containing hashes of the prompt, input documents and answer, plus a model-name string; an AI operator and human reviewer sign it. Any byte change produces a different hash. The registry is free to read through RPC, while a Cloudflare Worker offers agent lookups for $0.01 USDC via x402; NEAR AI Agent Market and OpenServ provide distinct payment and request paths. The system does not prove that the named model produced the answer, and wallet signatures are not qualified electronic signatures. The article says there are no real users or paid mainnet lookups yet, and the demonstrated signers are the author's own wallets, so the project remains a demo. ### Source excerpt Open-source registry on Base: an AI operator and a human reviewer co-sign an AI-output manifest; anyone verifies it free, agents pay $0.01 via x402. ## Building agents that transact with Anchor Browser and AgentCore payments DevFeed: [Building agents that transact with Anchor Browser and AgentCore payments]() Original publisher: [Read original article]() Author: Cher Simon Published: 2026-10-13T20:10:33Z Content type: tutorial Language: en Sources: [Artificial Intelligence]() Topics: [Amazon Bedrock AgentCore](), [Amazon Bedrock](), [Agent Browser](), [agentic browsing]() Tags: [ai-agents](), [amazon-bedrock](), [amazon-bedrock-agentcore](), [automation](), [customer-solutions](), [intermediate-200](), [x402]() ### AI overview The article describes an integration that lets AI agents access x402-protected web pages and APIs by handling payment challenges within an Anchor Browser session. Amazon Bedrock AgentCore payments checks session budgets, signs transactions through a configured wallet provider, and keeps wallet credentials out of the agent runtime. It also walks through setup, payment flow, and spending controls. ### Source excerpt Learn how the AWS Generative AI Innovation Center Partner Agent Factory and Anchor Browser built AI agents that autonomously pay for x402-protected web resources and APIs. Amazon Bedrock AgentCore payments checks budgets, signs transactions, and retries requests without exposing wallet credentials to the agent runtime. ## Payments on Solana: September 2026 in Five Stories DevFeed: [Payments on Solana: September 2026 in Five Stories]() Original publisher: [Read original article]() Author: Solana Foundation Published: 2026-10-09T12:46:00Z Content type: news Language: en Sources: [Solana News Feed]() Topics: [Solana](), [API Business Models]() Tags: [2026](), [ai](), [blockchain](), [blockchain-technology](), [crypto-news](), [cryptocurrency](), [defi](), [nfts](), [payments](), [podcasts](), [recap](), [solana](), [solana-ecosystem](), [stablecoin](), [stablecoins](), [web3](), [x402]() ### AI overview A roundup of five September 2026 payments developments on Solana: Payment Channels reached more than one million payments per second in testing, Column integrated stablecoins into its banking core, Open USD launched, and Solana accounted for 76% of x402 agent payments. Stablecoin supply on Solana also reached a reported record of $17.3 billion. ### Source excerpt Payment Channels topped 1 million payments per second in testing as Solana stablecoin supply reached $17.3 billion and x402 share hit 76%. ## Pay-per-inference for AI agents: How BlockRun and Incarna use Amazon Bedrock AgentCore payments DevFeed: [Pay-per-inference for AI agents: How BlockRun and Incarna use Amazon Bedrock AgentCore payments]() Original publisher: [Read original article]() Author: Peter Jiang Published: 2026-10-08T18:33:29Z Content type: article Language: en Sources: [Artificial Intelligence]() Topics: [Amazon Bedrock AgentCore](), [Amazon Bedrock]() Tags: [ai-agent](), [amazon-bedrock](), [amazon-bedrock-agentcore](), [customer-solutions](), [foundational-100](), [infrastructure](), [x402]() ### AI overview Amazon Bedrock AgentCore payments lets AI agents pay for services on demand, with spending limits enforced at the infrastructure layer. Incarna integrated the service with BlockRun's x402 model inference in three days and reported more than 1,000 beta payments, each settled individually on-chain. ### Source excerpt Amazon Bedrock AgentCore payments gives AI agents a managed way to pay for services on demand, with spending limits enforced by the infrastructure. See how Incarna's agents pay BlockRun for model inference one request at a time over x402, cutting the work of adding x402 payment support from months to days. ## Monetization Gateway beta: charge AI agents for consumption with HTTP 402 DevFeed: [Monetization Gateway beta: charge AI agents for consumption with HTTP 402]() Original publisher: [Read original article]() Author: Isaac Bremseth Published: 2026-09-30T13:00:00Z Content type: release Language: en Sources: [Cloudflare Blog]() Topics: [API Monetization](), [API Business Models](), [gateway](), [OpenAPI Specification]() Tags: [agents](), [ai](), [ai-bots](), [apis](), [beta](), [birthday-week](), [bots](), [cloudflare](), [gateway](), [http](), [mcp](), [monetization](), [payments](), [x402]() ### AI overview Cloudflare has opened a closed beta of its Monetization Gateway, which lets domain owners charge AI agents for access to websites, APIs, MCP tools, and datasets. The article argues that agent usage calls for low-cost, fast payments tied to consumption, such as per request, search query, or token, and says stablecoin and blockchain networks can support those requirements. It also describes production customer use cases. ### Source excerpt Cloudflare's AI Gateway, Ceramic.ai, Stocktwits, and more are using the Cloudflare Monetization Gateway today to charge agents for access to tokens, APIs, and MCP tools. U.S.-based sellers can now apply for access to the closed beta. ## What Is the x402 Protocol? HTTP 402 Payments for AI Agents DevFeed: [What Is the x402 Protocol? HTTP 402 Payments for AI Agents]() Original publisher: [Read original article]() Author: Ayush Agarwal Published: 2026-09-08T00:00:00Z Content type: article Language: en Sources: [Dodo Payments Blog]() Topics: [HTTP](), [API Monetization](), [A2A protocol]() Tags: [2](), [a2a](), [about](), [agents](), [ai](), [ai-agents](), [card](), [guide](), [handshake](), [headers](), [http](), [payment](), [payments](), [protocol](), [rails](), [required](), [what-is](), [works](), [x402](), [x402-protocol]() ### AI overview x402 lets a client pay for one resource request without an account or API key: the server returns HTTP 402 with payment requirements, the client signs a payment and retries with `PAYMENT-SIGNATURE`, and the server verifies and settles it before returning the resource. An optional facilitator handles `/verify` and `/settle`, sparing the seller chain infrastructure; servers can also handle those steps themselves. The protocol supports multiple payment options, but a transaction requires the client and facilitator to support the same scheme and network. Its `exact` scheme covers fixed amounts; other schemes remain under development. x402 suits machine-to-machine micropayments, but requires a funded wallet and token settlement and does not provide subscriptions, chargebacks, tax handling, invoicing, or fiat payouts. The article recommends pairing it with a separate billing rail when serving human subscribers. ### Source excerpt A technical guide to the x402 protocol: how the HTTP 402 payment handshake works, the PAYMENT-REQUIRED and PAYMENT-SIGNATURE headers, facilitators, payment schemes, and where x402 fits next to card rails.