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Guides and answers for Signl: connecting your AI agent over MCP, how credits work, buying signals, Loops, and fixing common errors.
Getting started
What is Signl?
Signl is a GTM data layer your AI agent queries directly: companies, buying signals and verified contacts, over MCP.
Connect your agent to Signl
Connect Claude, ChatGPT or any MCP client to Signl using OAuth or an API key. Takes about two minutes.
Connect ChatGPT to Signl
Add Signl as a custom MCP connector in ChatGPT, and what to do if the setup does not match what you see.
Connect Cursor, VS Code and the CLI
The API key path for clients without an OAuth flow: generating a key, adding it as a bearer token, and the config for each client.
Credits and billing
How credits work
Credits are spent only when Signl delivers a verified contact. Searching, misses, retries and cached repeats are all free.
Earn your free credits
Free credits are earned as you set up Signl. Here is every step, what it pays, and how long you have to claim it.
Plans and pricing
Signl is free to start with no card. Growth is $97 per month and Unlimited is $497 per month for teams running Signl across their GTM workflow.
What happens when I run out of credits
Running out stops contact enrichment but nothing else. Search, signals and Loops keep working, and you are never charged.
Using Signl
Search companies and buying signals
How to ask your agent for the right companies: filters that work, signals you can search on, and how results are ranked.
Define your ICP
Your ideal customer profile scores every search, weekly drop and Loop automatically. It is the highest-leverage setup step.
Loops: standing searches that watch your market
A Loop is a saved search that re-runs on a schedule and collects new matching companies, so you find accounts without asking.
Signl MCP tool reference
Every Signl MCP tool: what it does, its parameters, what it returns, what it costs, and what it cannot do.
What Signl covers, and what it does not
The 35 industry categories, the filters that exist, the signal types that are real, and the things people ask for that we do not have.
Security and data handling
How credentials are stored, what a connected agent can reach, how long person-level data is kept, and how to request erasure.
Troubleshooting
My agent cannot see Signl's tools
If your AI says it has no Signl tools, it is almost always one of four things. Work through them in this order.
No verified email was found
What a miss means, why you are not charged for one, and what to try next when a contact cannot be verified.
Error messages and what they mean
Every result Signl can return when something is unavailable, what caused it, and how to resolve it.
Still stuck?
We answer support questions ourselves, usually the same day.