Claude guide

Search PubMed papers with Claude

Count and list biomedical papers on a topic, with titles, journals and dates. PubMed is free.

1. Connect looot to Claude

In Claude, open Customize, then Connectors.
Click "+ Add", then "Add custom connector".
Name it looot and paste the remote MCP server URL https://api.looot.ai/mcp. Click Continue.
Review the authentication settings Claude detects and click Continue. Under Authentication pick "Sign in now" or "Sign in when needed". Under OAuth client, Anthropic recommends "Use Claude's published identity". Click Add.
looot's sign-in page opens: sign in with your looot account and allow access. Runs are paid from your prepaid looot balance.

Anthropic's help center says custom connectors work on Free, Pro, Max, Ultra, Team and Enterprise, and a Free account can add one custom connector. On Team and Enterprise an Owner or Primary Owner adds it under Organization settings, Connectors, and each member then clicks Connect under Customize, Connectors.

In Claude Code instead: Add looot from your terminal with one command:

Command

claude mcp add --transport http looot https://api.looot.ai/mcp

Then type /mcp inside Claude Code and follow the browser sign-in.

Source, read 2026-11-10: Anthropic help center: Get started with custom connectors using remote MCP
Source, read 2026-11-10: Claude Code docs: Connect Claude Code to tools via MCP

2. Ask Claude

In a new chat, click the "+" button at the lower left, choose Connectors and switch looot on for this conversation. Then paste the prompt.

Prompt

Use looot to search PubMed for [topic] with the job research.papers.pubmed.search, asking for 10 results. Then run research.papers.pubmed.summary on the ids it returns. Tell me how many papers match, then list each with title, journal and publication date.

3. Jobs it calls and what they cost

research.papers.pubmed.search
1 call, from free (PubMed (NCBI E-utilities), the cheapest of 1 provider)
About the cheapest provider
research.papers.pubmed.summary
1 call, from free (PubMed (NCBI E-utilities), the cheapest of 1 provider)
About the cheapest provider

One use costs from free at today's cheapest providers. A provider that misses can fall back to the next one, which can cost more; looot charges only the calls that ran, from your prepaid balance.

Providers in the real run below:PubMed (NCBI E-utilities)

4. A real run

We ran this task through the looot MCP on 2026-11-10. Asked: semaglutide[ti] AND 2025[dp]. Total charged: $0.

906 papers have semaglutide in the title with a 2025 publication date. The search returned the first 10 PubMed ids.
The summary call turned ids into titles, for example: "Efficacy of Subcutaneous Semaglutide Dose Escalation in Reducing Insulin in Patients With Type 2 Diabetes" (Federal Practitioner, November 2025).
The other two we read: a case series on liver biomarkers in adolescents (JPGN Reports) and a mouse study of nephritis (Kidney360).

research.papers.pubmed.search on pubmed-search (PubMed (NCBI E-utilities)): answered, charged $0. Run id run_94ccc006b0d7482b86b5a8d809e689a1.
research.papers.pubmed.summary on pubmed-summary (PubMed (NCBI E-utilities)): answered, charged $0. Run id run_3541f410c80d4db0a1ca3d1d1ea07301.

Good to know

PubMed search terms accept field tags: semaglutide[ti] searches titles only, 2025[dp] limits to a publication year.

The same task in ChatGPT All Claude guides

Give your agent every data provider, one key.

Start your workspace, top up, and paste one prompt into the agent you already use.

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