Findings on what compounds and supplements do in the body, with evidence strength, quote and paper.
- Passed: Handshake
- Passed: Tools listed
- Passed: Updated recently
Median latency 699 ms · Last checked
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Evidence for your next connection.
Independent measurements of remote MCP servers. Every observation has a timestamp.
Read-only probesMCP server · Other
Ranks VC firms for a startup from a short description, with similar companies each firm backed.
1 failed · 8 not measured
Median of successful probes over 7 days
Share of countable probes over 30 days, including daily rollups. Auth challenges are excluded.
Tool definitions returned by this server
Independent monitoring
Responded
The server completed its last measured handshake. This is an observation, not a guarantee.
Last checked| Test area | Passed | Failed | Unmeasured |
|---|---|---|---|
ConnectionCan a client connect and discover tools? | 5 | 0 | 0 |
Reliability & speedDoes it respond consistently and quickly? | 0 | 0 | 4 |
Access & authenticationWhat is required to use this server? | 1 | 0 | 2 |
Tool qualityAre the tool definitions usable by an agent? | 4 | 0 | 0 |
Publisher identityCan the publisher be traced to its source? | 3 | 1 | 2 |
Unmeasured means there is not enough evidence to decide. How these checks work
Start using F4 Raise
Choose your client, copy the configuration, then enable the server in your client’s MCP settings.
Run this command in your terminal, then restart Claude Code.
Claude Code
claude mcp add --transport http f4-raise https://app.f4.fund/api/public/raise/mcpCapabilities
Use this when a founder asks to have their F4 Raise report link emailed to them, giving their own address and the code from a find_vc_firms result. Emails the founder one message with a personal link that opens F4's free report form with the description already filled in. It needs the code at the end of the report link in a find_vc_firms result, and sends at most one email per code. F4 stores the email address with the search for 13 months and may email the founder about their raise. Every email includes a link to stop future emails. Each address has daily and weekly limits. The answer shows a masked address.
DiscoveredUse this when a founder asks which venture capital investors to pitch, wants an investor list for a fundraise, or asks which VC firms back a kind of startup. Not for fundraising mechanics such as SAFEs, valuation or dilution, or for investor contact details. Ranks up to 20 public VC firms for a startup from a plain-language description of 10 to 500 characters. Each firm comes with up to three public companies it backed that resemble the startup, and a link to its F4 page. The result also carries one link to a free, longer report on f4.fund built from the company's pitch deck, which ranks about 100 firms. The optional stage removes firms whose stated stages are all two or more steps away from it, so a firm one stage away can remain. The optional round size removes firms whose smallest cheque is more than twice the round. The optional location lists firms whose stated geography excludes it after the firms that invest there. These are applied only when given. The optional website is used for its domain, and its home page may be read. F4 stores the description, website domain, stage and round size to fill in the report form and count how the plugin is used. Each call saves a new search and prefilled report link. It sends no email and contacts no firm, and it returns no contact details.
DiscoveredUse this when the user asks about a specific VC firm by name, or about a firm in a find_vc_firms result. Returns the public profile of one VC firm: name, location, website, a short thesis, the stages it has invested at, check size, sectors, geographies and up to 10 recent public portfolio companies. The firm is a slug from a find_vc_firms result or a name. It returns no contact details and no team names, and it covers only firms that have a public F4 page.
DiscoveredRecent measurements
| Checked | Result | Response | Tools |
|---|---|---|---|
| Connected | 589 ms | 3 |