# Will This Person Answer

> Find a mobile from a LinkedIn profile, and check whether a number is worth calling. REST API and MCP server docs.

- [Overview](https://docs.willthispersonanswer.com/index.md): Find a mobile from a LinkedIn profile, and check whether a number is worth calling. One call, one person, one answer, through the REST API or the MCP server.
- [Authentication](https://docs.willthispersonanswer.com/authentication.md): One API key authenticates the REST API and the MCP server. Send it as a Bearer token.
- [Credits](https://docs.willthispersonanswer.com/credits.md): Every call is paid in credits from one balance, shared by the API, MCP and CSV uploads. You only pay for what comes back.
- [Rate limits](https://docs.willthispersonanswer.com/rate-limits.md): Requests are limited per API key so one integration cannot slow down another.
- [Errors](https://docs.willthispersonanswer.com/errors.md): Every REST error has the same shape: an HTTP status, a code you can branch on, and a readable message.
- [Find Mobile](https://docs.willthispersonanswer.com/api-reference/find-mobile.md): Takes one LinkedIn profile and returns the person's mobile. A mobile costs 3 credits. A profile with no mobile, or a lookup that could not run, is free.
- [Check Number](https://docs.willthispersonanswer.com/api-reference/check-number.md): Takes one name and one number, from anywhere in the world, and says whether the number is worth calling and what to do next. A number that gets a priority costs 2 credits. One we could not check is free.
- [List requests](https://docs.willthispersonanswer.com/api-reference/list-requests.md): Your recent requests, newest first, with counts and credits. No contact details. Free.
- [Get request](https://docs.willthispersonanswer.com/api-reference/get-request.md): One saved request with every result in it, each in the same shape the original call returned. Free.
- [Delete request](https://docs.willthispersonanswer.com/api-reference/delete-request.md): Deletes a saved request and its results now, instead of waiting 30 days. Free.
- [Priorities and signals](https://docs.willthispersonanswer.com/api-reference/priorities.md): The priority orders a call list. It is not a probability that anyone answers.
- [Connect your AI tool](https://docs.willthispersonanswer.com/mcp/connect.md): Add the MCP server to your AI tool and ask it to find mobiles and tell you who to call first. Same account, same credits as the API.
- [MCP tools](https://docs.willthispersonanswer.com/mcp/tools.md): Each tool is one call, one person, and returns the same answer as its endpoint. They are billed the same way.
- [MCP errors](https://docs.willthispersonanswer.com/mcp/errors.md): Over MCP, errors come back inside a successful response as a tool result with isError set to true. The text starts with an uppercase code.


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