# Locus Pro

> Locus Pro gives personal AI agents and enterprise platforms one prepaid credit
> balance for pay-per-use APIs, data, and tools. Connect through hosted MCP with
> browser OAuth, or use API / SDK access. The Free plan has no monthly subscription;
> optional paid plans add included monthly credits and workspace features.
> Enterprise adds customer balances, usage attribution, markup, and embedded billing.
> Locus Pro does not require a crypto wallet. Pay With Locus is the separate USDC
> wallet product on Base. Tool availability and prices come from the live catalog.

> Primary product site: https://paywithlocus.com/. Application and sign-in: https://platform.paywithlocus.com.
> Technical documentation: https://docs.paywithlocus.com. Read [the docs index](https://docs.paywithlocus.com/llms.txt).
> [Published plans](https://paywithlocus.com/pricing) distinguish monthly included credits
> (which expire each billing period) from purchased credits. Do not infer a universal
> price, free upstream usage, or provider availability from a subscription price.

> **You are on:** `https://api.paywithlocus.com/api` | [llms.txt](https://paywithlocus.com/llms.txt) | [docs](https://docs.paywithlocus.com)
>
> Locus runs on multiple environments -- make sure every URL you call matches your expected environment.
> | Environment | Landing | API | Docs |
> |---|---|---|---|
> | Production | paywithlocus.com | api.paywithlocus.com | docs.paywithlocus.com |
> | Beta | beta.paywithlocus.com | api.beta.paywithlocus.com | docs.paywithlocus.com |
> | Stage | stage.paywithlocus.com | api.stage.paywithlocus.com | docs.paywithlocus.com |
>
> If the API URL above doesn't match your expected environment, re-fetch this file from the correct domain.

## Locus Pro — setup, tools, and billing (start here)
- [Product overview](https://paywithlocus.com/): One connection and one prepaid balance for agent tools.
- [Agent signup skill](https://paywithlocus.com/skill.md): Set up Locus Pro and connect an agent.
- [Agent connections](https://paywithlocus.com/agent/mcp.md): Hosted MCP setup and authentication.
- [Guides](https://paywithlocus.com/guides): Integration choices, billing, and spending controls.
- [Quickstart](https://docs.paywithlocus.com/locus-pro/quickstart): Make your first metered API call in under five minutes.
- [Credits & pricing](https://docs.paywithlocus.com/locus-pro/credits-and-pricing): Credit denomination, markup, and the exact charge math.
- [Funding & billing](https://docs.paywithlocus.com/locus-pro/funding-and-billing): Wholesale top-ups, auto-recharge, end-user top-ups, payouts, refunds, and the ledger.
- [Authentication & scopes](https://docs.paywithlocus.com/locus-pro/authentication-and-scopes): Which credential to use, and how to preflight its effective access.
- [The catalog](https://docs.paywithlocus.com/locus-pro/catalog): The opt-in set of services you put in front of your users, at base prices you mark up.
- [API directory](https://docs.paywithlocus.com/locus-pro/catalog-directory): Every service in the catalog with its base price.
- [Connect an agent](https://docs.paywithlocus.com/locus-pro/connect-agents): Create a scoped connection and add it to an MCP client.
- [Framework integrations](https://docs.paywithlocus.com/locus-pro/frameworks): Model SDKs, agent frameworks, coding clients, or a custom MCP runtime.
- [SDK reference](https://docs.paywithlocus.com/locus-pro/sdk): @withlocus/credits, the Node server SDK.
- [Widget](https://docs.paywithlocus.com/locus-pro/widget): Embed an end-user balance and top-up button.
- [Dashboard](https://platform.paywithlocus.com): Manage credits, catalog, spend controls, and agent connections.

## Pay With Locus (AgentPay) — on-chain agent wallets
- [Wallet skill](https://paywithlocus.com/wallet/skill.md): USDC wallets, transfers, and on-chain API payments
- [Onboarding](https://paywithlocus.com/wallet/onboarding.md): First-time setup for new agents

## API catalog indexes
- [Wrapped API reference](https://paywithlocus.com/wapi/index.md): Locus Pro provider operations, parameters, estimated prices, and the credits call contract.
- [MPP reference](https://paywithlocus.com/mpp/index.md): Direct machine payments via Tempo.
- [x402 reference](https://paywithlocus.com/x402/index.md): Direct HTTP 402 payments via Base USDC.
- [Expanded catalog index](https://paywithlocus.com/llms-full.txt): Every documented provider, including marketplace listings. Large file; prefer the targeted indexes above.

## Apps & Tools
- [Laso](https://paywithlocus.com/wallet/laso.md): Prepaid virtual cards for AI agents
- [Checkout](https://paywithlocus.com/wallet/checkout.md): Stripe-style payment SDK

## Marketing pages
- [Locus Pro for platforms](https://paywithlocus.com/): Agent tool billing and metering for platforms
- [AI agent tools](https://paywithlocus.com/ai-agent-tools): Tools an AI agent can use — direct API, MCP, or embedded platform billing
- [Agent tool catalog](https://paywithlocus.com/tools): Browse every pay-per-use provider and service
- [MCP marketplace](https://paywithlocus.com/mcp-marketplace): Paid tools for MCP agents over one connection
- [Locus Pro](https://paywithlocus.com/pro): Pay-as-you-go tools for your own agent
- [Agentic payments guide](https://paywithlocus.com/guides/agentic-payments): How agents pay for tools and APIs under policy
- [MCP payments](https://paywithlocus.com/use-cases/mcp-payments): Integrate payments into MCP tool calls
- [Developers](https://paywithlocus.com/developers): Policy-governed agent payments for developers
- [Pricing](https://paywithlocus.com/pricing): Pay-per-use calls and Locus Pro plans

## Optional
- [Heartbeat](https://paywithlocus.com/wallet/heartbeat.md): Health monitoring
- [Request Credits](https://paywithlocus.com/wallet/request_credits.md): Promotional USDC credits

## Implementation guides

- [Connect AI Agent Tools with Locus Pro](https://paywithlocus.com/guides/connect-ai-agent-tools): Connect a personal agent or enterprise runtime to paid APIs through hosted MCP, choose the right credential, and verify the first tool call.
- [MCP vs API vs SDK for AI Agent Tools](https://paywithlocus.com/guides/mcp-vs-api-vs-sdk): Choose hosted MCP for interactive agents or API and SDK access for application code. Compare discovery, credentials, billing, and customer attribution.
- [Prepaid Credits for AI Agents: How They Work](https://paywithlocus.com/guides/prepaid-credits-for-ai-agents): Understand Locus Pro credit balances, subscription allowances, purchased credits, usage pricing, reservations, refunds, and funding controls.
- [Usage-Based Billing for AI Agents and APIs](https://paywithlocus.com/guides/usage-based-billing-for-ai-agents): Design customer balances, exact usage prices, markup, retries, and receipts for an AI product, with a worked Locus Pro billing example.
- [API Key Management and BYOK for AI Agents](https://paywithlocus.com/guides/api-key-management-and-byok): Compare managed provider access with enterprise BYOK. Import supported OpenAPI actions, protect upstream credentials, and understand who pays.
- [Control AI Agent Tool Spending](https://paywithlocus.com/guides/agent-tool-spending-controls): Combine prepaid balances, account caps, scoped credentials, tool permissions, and live-quote ceilings to control agent tool costs.
- [Locus Pro vs Direct API Integrations](https://paywithlocus.com/guides/locus-pro-vs-direct-api-integrations): Compare API coverage, credentials, usage pricing, billing ownership, data handling, and maintenance when choosing Locus Pro or direct providers.
- [How to Evaluate AI Agent Tools and API Providers](https://paywithlocus.com/guides/evaluate-agent-tool-providers): Evaluate agent tools with representative tasks, schema checks, useful results, latency, real charges, and failure handling before rollout.
- [How to add the Locus MCP server to Claude Code](https://paywithlocus.com/guides/add-locus-to-claude-code): Add an MCP server to Claude Code in two commands. Install the Locus plugin, sign in with /mcp, and let Claude call paid APIs from one credit balance.
- [How to add Locus to the Claude desktop app](https://paywithlocus.com/guides/add-locus-to-claude-desktop): Add Locus to the Code tab in the Claude desktop app. Add the plugin marketplace in Customize, sign in from a terminal, and fix a shadowing local entry.
- [How to add Locus to Claude.ai as a custom connector](https://paywithlocus.com/guides/add-locus-to-claude-ai): Add Locus to Claude.ai or Cowork as a custom connector, upload three skills, and check your balance. Includes the Team plan Owner-only limit.
- [How to add Locus MCP to Codex CLI and app](https://paywithlocus.com/guides/add-locus-to-codex): Add MCP to Codex: install the Locus plugin, run codex mcp login, and approve OAuth. Your agent gets paid APIs on one credit balance, no provider keys.
- [How to add Locus MCP to ChatGPT (Developer mode)](https://paywithlocus.com/guides/add-locus-to-chatgpt): Add an MCP server to ChatGPT with Developer mode: create a Locus custom app with OAuth, select it in chat, and call paid APIs from one credit balance.
- [How to add Locus MCP servers to Cursor](https://paywithlocus.com/guides/add-locus-to-cursor): Add MCP to Cursor with a one-click install link or ~/.cursor/mcp.json. Approve Locus with OAuth and call paid APIs from one credit balance, no keys.
- [How to add Locus MCP to Cline](https://paywithlocus.com/guides/add-locus-to-cline): Set up Cline MCP for Locus Pro: install the remote server with OAuth, add the three Locus skills, and call paid APIs from one credit balance.
- [How to add an MCP server to VS Code with OAuth](https://paywithlocus.com/guides/add-locus-to-vs-code): Add the Locus Pro MCP server to VS Code: save .vscode/mcp.json, start it from MCP: List Servers, approve OAuth, and call paid APIs from Copilot Chat.
- [How to add Locus MCP to Gemini CLI](https://paywithlocus.com/guides/add-locus-to-gemini-cli): Set up Gemini CLI MCP for Locus Pro: run gemini mcp add, sign in with /mcp auth, and let Gemini call paid APIs from one prepaid credit balance.
- [How to add Locus to Grok, Grok Build, and Grok Bot](https://paywithlocus.com/guides/add-locus-to-grok): Add the Locus Pro MCP server to Grok. Set up a grok.com custom connector, install it in the Grok Build CLI with grok mcp add, or ask Grok Bot.
- [How to add Locus to OpenClaw, Hermes, Muse, and Instinct](https://paywithlocus.com/guides/add-locus-to-ai-agents): Add Locus to AI agents like OpenClaw, Hermes, Muse, and Instinct with one install prompt. See what it installs, what to approve, and what was tested.
- [How to connect an MCP server to any AI agent](https://paywithlocus.com/guides/add-locus-to-any-mcp-client): How to connect an MCP server to an AI agent: the Locus Pro Streamable HTTP URL, remote MCP server OAuth with PKCE, the CLI, and headless bearer credentials.
- [Is there an OpenRouter for APIs?](https://paywithlocus.com/guides/openrouter-for-apis): Is there an OpenRouter for APIs? Compare Locus Pro, RapidAPI, x402 Bazaar, Composio, Eden AI and ToolRoute on billing, API keys, MCP access and controls.
- [What's the best web search MCP server?](https://paywithlocus.com/guides/best-web-search-mcp): Find the best web search MCP server. Exa, Tavily, Brave, Firecrawl, Parallel and Perplexity compared on benchmark scores, free tiers and per-call prices.
- [Agentic payment platforms compared](https://paywithlocus.com/guides/agentic-payment-platforms): Agentic payment platforms compared: Skyfire, Nevermined, Payman, Crossmint, Coinbase, Stripe, Visa, Mastercard, and Locus by rails, custody, and controls.
- [What's the best wallet for an AI agent?](https://paywithlocus.com/guides/best-ai-agent-wallets): What's the best wallet for an AI agent? Compare Coinbase, Circle, Crossmint, Privy, Turnkey, Skyfire, and Pay With Locus on keys, chains, and spend limits.
- [What is x402? How HTTP 402 payments work](https://paywithlocus.com/guides/what-is-x402): What is x402? The open HTTP 402 payment standard explained: the payment flow, facilitators, EIP-3009, V2 changes, the Bazaar, and how Locus uses it.
- [What does HTTP 402 Payment Required mean?](https://paywithlocus.com/guides/http-402-payment-required): What does HTTP 402 Payment Required mean? Why APIs return it, how to tell a credits error from an x402 or MPP challenge, and how a client should respond.
- [What is the Machine Payments Protocol (MPP)?](https://paywithlocus.com/guides/what-is-machine-payments-protocol): What is the Machine Payments Protocol (MPP)? How the Stripe and Tempo HTTP 402 standard works, which payment methods it supports, and how it compares to x402.
- [What's the cheapest SERP API? 2026 price comparison](https://paywithlocus.com/guides/cheapest-serp-api): What's the cheapest SERP API? Per-1,000-query prices for Serper, DataForSEO, Scrapingdog, SearchAPI, Brave and SerpApi, checked September 29, 2026.
- [Firecrawl, Tavily and Apify alternatives for AI agents](https://paywithlocus.com/guides/web-scraping-api-alternatives): Firecrawl, Tavily and Apify alternatives for AI agents: pricing models, strengths and per-call costs for Exa, Parallel, Diffbot and Locus Pro.
- [Clay alternatives for AI agents: pay per lookup](https://paywithlocus.com/guides/clay-alternative): Clay alternatives for AI agents compared: Clay, Apollo, FullEnrich, Hunter and Locus Pro, with plan prices, credit models and when Clay is the better pick.
- [Composio alternatives: Arcade, Pipedream and Locus Pro](https://paywithlocus.com/guides/composio-alternatives): Composio alternatives compared: Arcade, Pipedream Connect, Smithery and Locus Pro. See which connect agents to user accounts and which pay for APIs.
- [Agentic payments guide](https://paywithlocus.com/guides/agentic-payments): Learn how AI agents pay for tools and APIs under predefined limits, policies, and audit controls using MCP, x402, and Locus infrastructure.
- [Best tools for Hermes agent](https://paywithlocus.com/guides/best-tools-hermes-agent): The most useful tools to install on a Hermes agent: web search, browser automation, paid APIs over MCP, and the hermes mcp commands to add each one.
- [Best tools for OpenClaw agent](https://paywithlocus.com/guides/best-tools-openclaw-agent): The most useful tools to install on an OpenClaw agent: web search, browser control, paid APIs over MCP, and the openclaw mcp commands to add each one.
- [Best MCP servers for Claude Code](https://paywithlocus.com/guides/best-mcp-servers-claude-code): The best MCP servers for Claude Code: paid APIs over one connection, search, browser control, and repos, with the claude mcp add commands to install each.
- [How to set up OpenClaw](https://paywithlocus.com/guides/setup-openclaw): Set up OpenClaw step by step: install, onboard, add MCP servers, and connect Locus Pro so your agent can call paid tools from one balance.
- [How to set up Hermes agent](https://paywithlocus.com/guides/setup-hermes): Set up the Hermes agent step by step: install, first run, add MCP servers, and connect Locus Pro so your agent can call paid tools from one balance.

## Use cases

- [AI Agent Wallet](https://paywithlocus.com/use-cases/ai-agent-wallet)
- [Agent tool marketplace](https://paywithlocus.com/use-cases/api-marketplace)
- [USDC Payments](https://paywithlocus.com/use-cases/usdc-payments)
- [Agentic Payments](https://paywithlocus.com/use-cases/agentic-payments)
- [Agent-to-Agent Payments](https://paywithlocus.com/use-cases/agent-to-agent-payments)
- [Spending Limits](https://paywithlocus.com/use-cases/ai-agent-spending-limits)
- [Pay-Per-Use API](https://paywithlocus.com/use-cases/pay-per-use-api)
- [OpenAI Pay-Per-Use](https://paywithlocus.com/use-cases/openai-pay-per-use)
- [Anthropic Pay-Per-Use](https://paywithlocus.com/use-cases/anthropic-pay-per-use)
- [DeepSeek Pay-Per-Use](https://paywithlocus.com/use-cases/deepseek-pay-per-use)
- [Audit Trail](https://paywithlocus.com/use-cases/ai-agent-audit-trail)
- [Escrow](https://paywithlocus.com/use-cases/escrow-for-ai-agents)
- [MCP Payments](https://paywithlocus.com/use-cases/mcp-payments)
- [HTTP 402 Payments](https://paywithlocus.com/use-cases/http-402-payments)
- [Virtual Card](https://paywithlocus.com/use-cases/ai-agent-virtual-card)
- [Crypto API Payments](https://paywithlocus.com/use-cases/crypto-api-payments)
- [AI Web Search](https://paywithlocus.com/use-cases/ai-web-search)
- [AI Image Generation](https://paywithlocus.com/use-cases/ai-image-generation)
- [Code Execution](https://paywithlocus.com/use-cases/ai-code-execution)
- [Financial Data](https://paywithlocus.com/use-cases/financial-data-api)
- [Speech API](https://paywithlocus.com/use-cases/ai-speech-api)
- [Use Apollo Without a Subscription](https://paywithlocus.com/use-cases/apollo-pay-per-use)
- [Find Leads Cheaply](https://paywithlocus.com/use-cases/find-leads-cheaply)
- [APIs Without Subscriptions](https://paywithlocus.com/use-cases/ai-apis-without-subscription)
- [Prospecting Stack Under $50](https://paywithlocus.com/use-cases/prospecting-stack-under-50)
- [X API Without Subscription](https://paywithlocus.com/use-cases/x-api-without-subscription)
- [Find Anyone's Email Address](https://paywithlocus.com/use-cases/find-email-address)
- [Text-to-Speech Without Subscription](https://paywithlocus.com/use-cases/text-to-speech-without-subscription)
- [Transcribe Audio Cheaply](https://paywithlocus.com/use-cases/transcribe-audio-cheaply)
- [Scrape Websites Without Subscription](https://paywithlocus.com/use-cases/scrape-websites-without-subscription)
- [Translate Text Cheaply](https://paywithlocus.com/use-cases/translate-text-cheaply)
- [Property Data Without Subscription](https://paywithlocus.com/use-cases/property-data-without-subscription)
- [Flight Search Without Subscription](https://paywithlocus.com/use-cases/flight-search-without-subscription)
- [Screenshot Websites Cheaply](https://paywithlocus.com/use-cases/screenshot-website-cheaply)
- [Cheapest LLM API](https://paywithlocus.com/use-cases/cheapest-llm-api)
- [Keyword Research Without Ahrefs](https://paywithlocus.com/use-cases/keyword-research-cheaply)