P402.io
Route, verify, and settle paid API calls with clear traces
P402.io launched on January 9, 2026 with 102 votes, #333 of 14,585 launches that month and more than 95% of that year's launches.
What it does
Most AI apps waste 70% of their budget. Wrong models. No caching. Payment fees that destroy micropayments. P402.shop: Compare 50+ AI APIs (GPT-5.2, Claude Opus 4.5, Gemini 3, more). Find the right model for your use case. See costs explode from 100 to 1M users. Free. P402.io: Accept micropayments without Stripe's $0.30 killing you. 1% flat fee. Built on x402—HTTP's payment standard, finally working. Vibe-coded apps break at scale. Optimized ones don't.
P402 meters every AI call and turns token usage into a live ledger for budgets, margins, workflows, policy results, and evidence.
P402 turns every AI request into an economic event with owner, workflow, model, provider, tokens, cost, budget, policy result, outcome, and evidence status. Private by default, metadata-only metering. No prompt storage required. Metadata-only mode is available from the first event. Provider invoices show totals after usage happens. They do not show which customer, feature, workflow, department, employee, model, or retry caused the cost. P402 records that ownership when the event happens. Embedded MCP server. Tools appear in Copilot agent mode on install. No config files. stdio MCP server. Add to your client config with P402_API_KEY . OpenAI-compatible endpoint. Drop-in replacement. Change…from p402.io
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x4022025 · x402.org · ▲119Hi HN – excited to announce x402, initially developed by Coinbase (YC 12) x402 lets any HTTP API charge per request without issuing API keys or storing credit cards. Buyers (humans or AI agents) keep funds in their own wallet and dynamically discover compatible endpoints, call them as usual, and automatically pay a microtransaction in USDC or other tokens to settle. 90 second demo: https://www.youtube.com/watch?v=PV-L2AfLhJg Problem: Every time we want to use a new API we have to: find the service online create a developer account, copy a secret key into env vars, pre-fund or…
delegareApr 2026 · delegare.dev · ▲70Hi guys, am building SecureLend.ai and when working on our underwriting agents (free trial, paid after) I had issues with seamless payment options. Of course I looked at x402 which I believe is a great protocol but not a fan of a) sharing private keys with the agent b) having a human in the loop or c) similar workaround e.g. pre-funded wallets So I started building out a solution. For my use case it was important to not only have stablecoins but also a fiat rail which is now implemented using Stripe. Initially I build a mandate system internally but am very glad and big shoutout to the guys…
CostPerPrompt – Live AI API pricing and real-workload cost calculatorsAug 2026 · costperprompt.com · ▲20Live pricing for 309+ AI models (GPT, Claude, Gemini, Llama, DeepSeek) plus real-world cost calculators: chatbots, API budgets, and token math. Updated 2026-09-06.
x402 wallet API: 9 Base endpoints, USDCAug 2026 · api.kachangsia.com · ▲19 Base endpoints for AI agents, paid in USDC per call
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