Datacircle
Find the best GTM APIs
We benchmark all the GTM APIs and we put the results on our website. Our MCP server is open to anyone, with no key. list_apis lists the GTM APIs on it, and search_plans finds their plans by API, provider or price.
Try asking Muse: "Which email enrichment API has the cheapest plan, and how does it score on Datacircle's benchmark?"
See the most upvoted connectors
Source: Submitted by its builder and screened before listing · First listed November 10, 2026
Last 24 hours
Each bar is one check, every 15 minutes. Green means it answered. Last checked 19 min ago.
Is it safe to connect?
What Muse can see: It does not ask you to sign in, so it cannot see your accounts. It only sees what Muse sends it from your request.
Before it acts: Read what Muse plans to do before you approve it, and remove the app from Muse when you stop using it.
musedirectory.ai is not part of Meta. More about how Muse handles your information
How to add it to Muse
Not in Muse's Connectors list yet, but Muse can still use it. Copy the request below and paste it into Muse. Muse asks before it shares anything with the app's site. Meta does not review apps used this way, so only use ones you trust. We tested this in the Muse app on September 24, 2026: Muse used an app's link directly this way and returned a live answer.
https://api.datacircle.dev/mcpNot in Muse's Connectors list yet. Muse can still use it: its page gives you a request to paste into Muse.
Also use it in ChatGPT or Claude
Datacircle is a remote MCP server, so any assistant that can add a custom connector by link can use it. Same link, same tools.
Add it to ChatGPT
- 1
Open ChatGPT settings
In ChatGPT, open Settings, then Connectors (called Apps & Connectors on some accounts).
- 2
Turn on developer mode
Under Advanced settings, switch on Developer mode. That is what lets you add a connector by link.
- 3
Create the connector
Choose Create, give it a name, paste the link as the MCP server URL, and save. If it needs a sign-in, ChatGPT asks for it here.
- 4
Use it in a chat
Start a chat, open the tools menu, pick the connector, and ask. ChatGPT asks before it runs a tool the first time.
Custom connectors need a paid ChatGPT plan, and on Team, Enterprise and Edu accounts only an admin can add them. Our "Working" label means the server answered us; it cannot tell whether your plan lets you add it. All connectors that work in ChatGPT
Add it to Claude
- 1
Open Claude settings
In Claude, open Settings, then Connectors.
- 2
Add a custom connector
Choose Add custom connector, give it a name, and paste the link.
- 3
Connect and use it
If it needs a sign-in, Claude sends you to it. Then turn the connector on in a chat from the tools menu and ask.
Custom connectors are available on paid Claude plans; on Team and Enterprise accounts an admin may need to add them. Our "Working" label means the server answered us; it cannot tell whether your plan lets you add it. All connectors that work in Claude
https://api.datacircle.dev/mcpWhat people ask Muse to do
Technical details: safety screening, tools, response time and recent checks
Response time at the last check: 77ms. Worked in n/a of checks over 30 days.
Screening · November 10, 2026
Screened, no issues found
Screening looks for known threats and hidden instructions at the time of the check, and runs again weekly and whenever the tool list changes. It cannot see the server's code, so only connect what you need and review what Muse asks to do. How screening works.
Tools · 2
list_apisLists the APIs on Datacircle's sheet and the number of plans and providers for each. Pass an API's name to search_plans. It takes no arguments and gives the whole sheet in one answer, every API in the sheet's order, with no paging: each API's name (api), how many plans (plans) ansearch_plansSearches Datacircle's sheet of API plans and gives the ones that match, best first unless you sort them. Call list_apis first for the APIs' names, then pass one as api for that API's plans; leave api out to search every API at once. Add query to find a provider or a plan by name,Link
https://api.datacircle.dev/mcpQuestions about Datacircle in Muse
How do I connect Datacircle to Muse?
Not in Muse's Connectors list yet, but Muse can still use it. Paste this into Muse: "Use Datacircle to help me. It is a free service with an MCP server at https://api.datacircle.dev/mcp. It does not need an API key. Ask me before you share anything with it." Muse asks before it shares anything with the app's site. Meta does not review apps used this way, so only use ones you trust. We tested this in the Muse app on September 24, 2026: Muse used an app's link directly this way and returned a live answer.
Is Datacircle working right now?
At the last check (November 10, 2026, 18:34 UTC) the endpoint was working, answering in 77ms. It is checked every 15 minutes.
Is Datacircle safe to connect to Muse?
It was screened on November 10, 2026 with the result "screened, no issues found". Screening checks the domain against threat feeds and reads the tools for hidden instructions and requests for passwords or card numbers. It cannot see the server's code, so grant only the access you need.
Is Datacircle free?
Yes. The connector is free to use. Your Muse plan and any account with Datacircle are separate.
What can Datacircle do in Muse?
It exposes 2 tools, including list_apis, search_plans. For example, you could ask Muse: "Which email enrichment API has the cheapest plan, and how does it score on Datacircle's benchmark?"
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