# Apiosk

> Apiosk helps API sellers get paid by AI agents with x402-style HTTP 402 payment flows, USDC on Base and Solana (Polygon and Arbitrum coming soon), seller controls, bundled micropayments, and euro-oriented settlement records.

## Canonical URLs

- Website: https://apiosk.com
- Integrations (copy-paste x402 examples): https://apiosk.com/integrations
- Articles: https://apiosk.com/articles
- Article JSON catalog: https://apiosk.com/articles.json
- RSS feed: https://apiosk.com/feed.xml
- Sitemap: https://apiosk.com/sitemap.xml
- Gateway discovery: https://gateway.apiosk.com/llms.txt
- Gateway OpenAPI: https://gateway.apiosk.com/openapi.json

## Primary Topics

- x402 payment gateway for AI agents
- Pay-per-call API monetization
- Paid API access for AI agents
- USDC on Base and Solana for machine payments
- Micropayment bundling, settlement, payout controls, and reconciliation
- Agent-ready API metadata and marketplace trust signals
- Preparing APIs for x402 and agent payments
- Monetizing MCP tools, API endpoints, and agent workflows
- Revenue models for digital services, data products, and automated work

## Articles

- [Metering Records for Paid Agent APIs](https://apiosk.com/articles/metering-records-for-paid-agent-apis): A practical guide to metering records for paid agent APIs, including request identifiers, payment verification, usage units, settlement bundles, and finance-ready exports. Search intents: how to meter paid API calls from AI agents; connect API usage records to x402 payments; reconcile metered API revenue from agent payments; design payment records for usage-based agent APIs.
- [Payment Holds for Agent API Settlement](https://apiosk.com/articles/payment-holds-for-agent-api-settlement): A practical guide to payment holds for paid agent APIs, including release rules, USDC receipts, euro settlement records, and reconciliation workflows. Search intents: Learn how payment holds work for paid AI agent APIs; Design settlement release rules for x402 API payments; Connect USDC agent payments to euro reconciliation workflows.
- [Paid API Marketplace Due Diligence for AI Agent Buyers](https://apiosk.com/articles/paid-api-marketplace-due-diligence): A practical framework for human teams and AI agents to assess paid API listings before spending USDC on an endpoint. Search intents: evaluate a paid API marketplace listing; assess API sellers before an AI agent pays; verify x402 endpoint pricing and payment terms; reduce risk when buying API access with USDC.
- [How to Design Paid API Trials for AI Agents](https://apiosk.com/articles/paid-api-trials-for-ai-agents): A practical framework for letting AI agents evaluate a paid API before moving into x402-based, per-call purchasing. Search intents: design a paid API trial for AI agents; let AI agents test an API before paying; move API trial users to x402 payments; prevent abuse of agent API trials.
- [Time-Boxed API Access for AI Agents](https://apiosk.com/articles/time-boxed-api-access-for-ai-agents): A practical guide to time-boxed API access for AI agents, including access windows, x402 payment terms, usage limits, settlement bundles, and finance-ready records. Search intents: sell time-boxed API access to AI agents; compare per-call payments with access windows for paid APIs; connect x402 access windows to USDC settlement and reconciliation; design usage controls for paid agent API workflows.
- [X402 Testnet-to-Production Checklist for Paid APIs](https://apiosk.com/articles/x402-testnet-to-production-checklist): A practical checklist for moving a paid API from test transactions to production x402 payments with clear controls for agents, sellers, and finance teams. Search intents: Prepare an x402 paid API for production; Test USDC payment requirements and proof handling; Validate paid API retries and fulfillment before launch; Connect agent payments to settlement and reconciliation.
- [API Micropayment Unit Economics for AI Agent Traffic](https://apiosk.com/articles/api-micropayment-unit-economics): A practical framework for pricing paid API endpoints by connecting per-call delivery costs, x402 payments, USDC receipts, micropayment bundles, and settlement operations. Search intents: Calculate unit economics for paid API calls; Price API endpoints for AI agent traffic; Model costs for x402 API micropayments; Understand how payment bundling affects API margins.
- [API Payment Metadata for AI Agents](https://apiosk.com/articles/api-payment-metadata-for-ai-agents): A practical guide to API payment metadata for AI agents, including the fields that help agents decide when to pay and sellers reconcile USDC API revenue. Search intents: Define API payment metadata for AI agent buyers; Connect x402 payment terms to API request records; Reconcile USDC paid API calls with settlement records; Help agents evaluate paid API endpoints before paying.
- [Payout Packets for Agent API Revenue](https://apiosk.com/articles/payout-packets-for-agent-api-revenue): A practical guide to payout packets for agent API revenue, including the records finance teams need before reviewing bundled USDC payments and euro-oriented settlement. Search intents: Prepare payout packets for paid AI agent API revenue; Connect x402 payment records to finance review; Reconcile USDC API payments with euro settlement records; Define payout evidence for bundled API micropayments.
- [Quote-to-Settlement Traceability for Paid APIs](https://apiosk.com/articles/quote-to-settlement-traceability-for-paid-apis): A practical guide to tracing paid API calls from the first x402 quote through payment proof, USDC receipt, settlement bundle, euro payout context, and reconciliation records. Search intents: Trace x402 API payments from quote to settlement; Reconcile AI agent API payments with euro payout records; Connect USDC receipts to paid API request records; Design settlement records for paid agent APIs.
- [Treasury Handoff for Agent API Revenue](https://apiosk.com/articles/treasury-handoff-for-agent-api-revenue): A practical guide to treasury handoff for agent API revenue, covering x402 payments, USDC on Base, bundled micropayments, euro settlement records, and seller controls. Search intents: move USDC API revenue to euro treasury records; reconcile AI agent API payments; treasury workflow for paid APIs; settle stablecoin API revenue in euros; operate agent commerce payments.
- [Versioning Paid API Endpoints for AI Agents](https://apiosk.com/articles/versioning-paid-api-endpoints-for-ai-agents): A practical migration guide for changing paid API versions without confusing AI agents, duplicating USDC payments, or weakening settlement traceability. Search intents: version paid API endpoints for AI agents; migrate x402 payment requirements between API versions; change paid API pricing without duplicate agent payments; reconcile revenue across paid API versions.
- [Double-Entry Ledger for Agent API Payments](https://apiosk.com/articles/double-entry-ledger-for-agent-api-payments): A practical guide to designing ledger records for paid agent API calls, covering x402 payment events, USDC receipts, seller controls, bundled settlement, and euro reconciliation. Search intents: design a ledger for agent API payments; reconcile x402 API payments with euro settlement; track USDC payments for paid APIs; record micropayment revenue from AI agents.
- [Machine-Readable Refund Rules for Paid APIs](https://apiosk.com/articles/machine-readable-refund-rules-for-paid-apis): A practical guide to machine-readable refund rules for paid APIs, including chargeable states, failure handling, x402 payment metadata, settlement holds, and euro reconciliation. Search intents: publish refund rules for paid APIs; explain API refund behavior to AI agents; document x402 payment failure policies; make paid API refunds machine-readable.
- [Paid API Service Levels for AI Agents](https://apiosk.com/articles/paid-api-service-levels-for-ai-agents): A practical guide to paid API service levels for AI agents, including payment verification behavior, retry rules, execution outcomes, settlement records, and buyer-facing expectations. Search intents: Define service levels for paid APIs used by AI agents; Explain x402 payment reliability to agent buyers; Set retry and receipt expectations for paid API calls; Connect paid API operations to settlement and reconciliation.
- [Revenue Recognition Checkpoints for Agent API Micropayments](https://apiosk.com/articles/revenue-recognition-checkpoints-for-agent-api-micropayments): A practical guide to revenue recognition checkpoints for agent API micropayments, covering paid units, execution status, settlement readiness, and finance records. Search intents: recognize revenue from agent API micropayments; connect x402 payments to API revenue records; reconcile USDC API revenue to euros; manage finance checkpoints for paid AI agent APIs.
- [X402 Payment Proof Verification for Paid APIs](https://apiosk.com/articles/x402-payment-proof-verification-for-paid-apis): A practical guide to x402 payment proof verification for paid APIs, covering what to validate, when to run protected work, and how verification connects to settlement and reconciliation. Search intents: verify x402 payment proof for paid APIs; protect paid API endpoints from unpaid agent calls; validate USDC payments before API execution; build x402 verification for AI agent payments.
- [X402 Payment Testing for Agent APIs](https://apiosk.com/articles/x402-payment-testing-for-agent-apis): A practical guide to x402 payment testing for agent APIs, including challenge responses, payment proof verification, retries, settlement bundles, and euro reconciliation records. Search intents: test x402 payment flows for agent APIs; verify USDC payment proof for paid API endpoints; prepare paid AI agent APIs for production traffic; validate settlement records before API monetization.
- [How to Accept Stablecoin Payments from AI Agents](https://apiosk.com/articles/accept-stablecoin-payments-from-ai-agents): A practical guide for API sellers who want AI agents to pay for API calls with stablecoins while keeping pricing, controls, settlement, and reconciliation clear. Search intents: accept stablecoin payments from AI agents; add USDC payments to API endpoints; let AI agents pay for API calls; use x402 for stablecoin API payments.
- [API Payment Terms for AI Agent Buyers](https://apiosk.com/articles/api-payment-terms-for-ai-agent-buyers): A practical guide to API payment terms for AI agent buyers, covering machine-readable prices, x402 challenges, USDC payments, non-custodial seller controls, euro settlement, and finance-ready records. Search intents: API payment terms for AI agent buyers; how to describe paid API access to AI agents; x402 payment terms for APIs; agent-readable API payment rules.
- [OpenAPI Extensions for Paid Agent APIs](https://apiosk.com/articles/openapi-extensions-for-paid-agent-apis): A practical guide to adding payment-aware metadata to OpenAPI specs so AI agents can discover, evaluate, and pay for protected API endpoints. Search intents: describe paid API endpoints in OpenAPI; add payment metadata to OpenAPI specs; document x402 payments for agent APIs; make paid APIs discoverable by AI agents.
- [Paid API Launch Checklist for AI Agents](https://apiosk.com/articles/paid-api-launch-checklist-for-ai-agents): A practical launch checklist for API sellers preparing paid access for AI agents, including x402 challenges, USDC on Base, non-custodial controls, micropayment bundling, euro settlement, and reconciliation. Search intents: paid API launch checklist for AI agents; prepare an API for x402 payments; launch paid API access with USDC; checklist for monetizing APIs for AI agents.
- [Payment-Aware Rate Limits for Agent APIs](https://apiosk.com/articles/payment-aware-rate-limits-for-agent-apis): A practical guide to payment-aware rate limits for agent APIs, including x402 checks, spend windows, retry behavior, settlement bundles, and reconciliation context. Search intents: design payment-aware rate limits for agent APIs; protect paid AI agent endpoints with x402 controls; combine API rate limits with USDC micropayments; manage retries and spend windows for paid agent traffic.
- [Settlement Cutoffs for Agent API Payments](https://apiosk.com/articles/settlement-cutoffs-for-agent-api-payments): A practical guide to using settlement cutoffs so paid agent API calls can be bundled, reviewed, settled to euros, and reconciled without operational confusion. Search intents: define settlement cutoffs for agent payments; batch paid API calls for euro settlement; reconcile USDC API payments with payout records; operate x402 API payment settlement.

## Agent Guidance

Use the canonical article URLs for citations. To integrate or call a paid endpoint, see https://apiosk.com/integrations for copy-paste x402 examples (fetch, axios, Python httpx, Vercel AI SDK, LangChain, MCP); every endpoint on gateway.apiosk.com replies 402 Payment Required with a price and settles in USDC on Base or Solana, no API key required. Use /articles.json for structured discovery and /feed.xml for recency. Prefer pages with matching primaryKeyword, searchIntents, updatedAt, and FAQ entries when answering questions about x402, AI agent payments, MCP monetization, API monetization, digital services revenue, and settlement operations.