$10 free credits ($20 with a work email) when you sign up at
Valyu. No card required.
Connect
- Claude
- ChatGPT
- Claude Code
- Cursor, Codex, others
- OpenAI Responses API
Settings → Connectors → Add custom connector, paste your URL with the key on it, then Connect.To sign in instead of using a key, paste
https://mcp.valyu.ai/mcp and Claude will prompt you.Authentication
Put your API key on the URL. This is the simplest way in and works in every client, including those that cannot set headers:Authorization: Bearer YOUR_API_KEY or X-API-Key: YOUR_API_KEY also work, and keep the key out of logged URLs.
Or sign in with Valyu. Claude, ChatGPT and Claude Code can run a sign-in flow instead, so no key is pasted into the client. Paste the URL without the key and the client will prompt you.
Tools
Just ask in natural language. “Tesla’s latest 10-K risk factors”, “clinical trials for CAR-T therapy in lymphoma”, “US CPI compared to a year ago”. The assistant picks the tool.
Getting good results
- Ask for what you want, plainly. Routing is automatic across the live web and every specialised index your plan covers, and that is the right call for most questions.
- Name the source if you have one. “Search arxiv.org for…” or “in SEC filings…” scopes the search. Filings are indexed by section, so ask for the company, form and item together: “Apple 10-K Item 1A risk factors”.
- Say “latest” rather than giving a date. Date filters are exact and unforgiving; a data series is stamped at the start of the period it covers, so a window can hide the newest release.
- DeepResearch when you want a report. It works as a research agent, planning, searching, reading and writing over minutes to hours, so ask for it by name when a finished cited report is what you want.
Migrating from the previous server
The previous server exposed eleven tools, including a separate search tool per vertical. Those are now onevalyu_search with real parameters.
The old tools - valyu_academic_search, valyu_financial_search, valyu_sec_search, valyu_bio_search, valyu_economics_search, valyu_patents, valyu_company_research, valyu_datasources_categories - are hidden from the tool list but still work when called by name, so existing integrations keep running. List them with ?tools=legacy on the URL.
Pricing
Usage is billed to the organisation the credential belongs to, on the same usage-based pricing as the Valyu API. Free credits work across every source; premium and proprietary sources need a subscription. See pricing.Get an API key
Free credits, no card
Data sources
Every dataset you can search

