MCP HeartbeatTHE MCP OBSERVATORY
Public workspace

Explore

Evidence for your next connection.

Independent measurements of remote MCP servers. Every observation has a timestamp.

Read-only probes

MCP server · Other

OnlyFonts

By onlyfonts.ai Verified namespace

Find free, openly licensed fonts by style, use or language, and get the CSS to use them.

Website
Connect to OnlyFonts
Checks passed
12 / 22

2 failed · 8 not measured

Median response
310 ms

Median of successful probes over 7 days

30-day uptime
Not measured

Share of countable probes over 30 days, including daily rollups. Auth challenges are excluded.

Discovered tools
3

Tool definitions returned by this server

Independent monitoring

Health & checks

Status history

Outdated check

Last connection measurement is over 24 hours old. Current availability is unknown.

Last checked
Check summary by test group
Test areaPassedFailedUnmeasured
ConnectionCan a client connect and discover tools?
500
Reliability & speedDoes it respond consistently and quickly?
004
Access & authenticationWhat is required to use this server?
102
Tool qualityAre the tool definitions usable by an agent?
310
Publisher identityCan the publisher be traced to its source?
312

Unmeasured means there is not enough evidence to decide. How these checks work

Inspect individual checks 22 recorded

Core

  • Pass
    Reachable

    Latest probe returned HTTP 200 in 310 ms.

  • Pass
    Valid handshake

    protocolVersion 2025-11-25, serverInfo.name onlyfonts.

  • Pass
    Lists tools

    tools/list returned 3 tools.

  • Pass
    Current protocol

    Negotiated 2025-11-25. The bar is 2025-06-18 or newer.

  • Pass
    HTTPS

    The endpoint URL is https.

Performance

  • Not measured
    Fast (p50)

    Median latency 310 ms over 1 samples in 7 days. The bar is 1000 ms. Need at least 5 samples.

  • Not measured
    Consistent (p95)

    95th percentile 310 ms over 1 samples in 7 days. The bar is 3000 ms. Need at least 20 samples.

  • Not measured
    Reliable (uptime)

    1 of 1 attempts returned a tool list in 30 days (100%). The bar is 99%. Need at least 30 samples.

  • Not measured
    Stable tool list

    Fewer than two successful probes in 30 days, so tool-list stability is not measured.

Access

  • Pass
    Open access

    tools/list succeeded with no credential, and the record declares none.

  • Not measured
    Standard auth

    Auth is not required, so the OAuth metadata check does not apply.

  • Not measured
    Free tier cited

    No publisher quote has been checked.

Tools

  • Pass
    Tools described

    Every tool description is at least 20 characters.

  • Pass
    Valid input schemas

    Every inputSchema is a JSON Schema object.

  • Fail
    Parameters documented

    4 of 8 parameters have a description (50%). The bar is 80%.

  • Pass
    Safety hints

    Every tool sets readOnlyHint or destructiveHint.

Publisher

  • Pass
    Verified namespace

    Listed in the Official MCP Registry.

  • Pass
    Website matches publisher

    The website host matches the reverse-domain namespace.

  • Fail
    Source repo linked

    No repository URL is on file.

  • Not measured
    Repo owner matches

    This namespace is not an io.github login, so the owner comparison does not apply.

  • Pass
    Recently updated

    Updated 2026-11-10T16:31:20.063924Z, within 180 days.

  • Not measured
    Open-source licence

    No GitHub repository to ask about a licence.

Start using OnlyFonts

Connect to this server

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 onlyfonts https://mcp.onlyfonts.ai/mcp

Capabilities

Tools 3

get_font

Use this when the person asks about one font: its weights and styles, its license, the languages it covers, or what to pair it with. id is a family's id, its name in lowercase with hyphens ("lora", "space-mono"). Not for the CSS that loads a font on a page. Answers one family: its name, page link, category, designer, license, every style it has, the languages it fully covers, the families that pair with it and the ones that look like it.

Discovered
get_font_css

Use this when the person wants to use fonts on a web page, in an app or in a design tool that takes CSS. ids are 1 to 4 family ids, like "lora" or "space-mono". weights are 100 to 900; each family gets the ones it has, its regular and bold when left out. italic adds the italic of each weight a family has. Not for downloading font files to install on a computer. Answers one stylesheet link from cdn.onlyfonts.ai that loads every family asked for, the same as an @import line, and each family's font-family line with a fallback.

Discovered
search_fonts

Use this when the person wants fonts for something: a style or mood, a use, a font by name, or a language to cover. For example "a warm serif", "a playful display font for a poster" or "a monospace for code". query is their words, at most 200 characters. category narrows to sans-serif, serif, monospace, display or handwriting. language keeps fonts that fully cover latin, latin-extended, ukrainian, greek, vietnamese, arabic, hebrew, thai, japanese, korean, chinese-simplified or devanagari. limit is 1 to 20, 8 when left out. Not for fonts installed on the person's computer, and not for paid fonts: the catalog holds free fonts only. Answers free, openly licensed font families from the onlyfonts catalog, best match first, each with its id, name, page link, category, designer and how many styles it has.

Discovered

Recent measurements

Probe history

View status
Latest stored probes. Raw probe rows are kept for 14 days.
CheckedResultResponseTools
Connected310 ms3

Related servers

All alternatives

Same function and industry, ranked by checks passed then median latency.

  • Responded16 / 22 checks passed
    Catalyst evidence graph

    catalystproject.aiVerified

    Findings on what compounds and supplements do in the body, with evidence strength, quote and paper.

    OtherOther

    • Passed: Handshake
    • Passed: Tools listed
    • Passed: Updated recently

    Median latency 699 ms · Last checked

  • Responded15 / 22 checks passed
    wcway

    wcway.comVerified

    Find the nearest public toilet worldwide. Read-only tools, no account, no API key.

    OtherOther

    • Passed: Handshake
    • Passed: Tools listed
    • Passed: Updated recently

    Median latency 49 ms · Last checked

  • Responded15 / 22 checks passed
    Pick My Costume

    pickmycostume.comVerified

    Recommends Halloween costumes you can actually build, with step-by-step DIY build guides.

    OtherOther

    • Passed: Handshake
    • Passed: Tools listed
    • Passed: Updated recently

    Median latency 57 ms · Last checked

  • Responded15 / 22 checks passed
    Routine Run: write a routine

    routinerun.comVerified

    Write a step-by-step routine and get a link that opens it in Routine Run on iPhone. No sign-in.

    OtherOther

    • Passed: Handshake
    • Passed: Tools listed
    • Passed: Updated recently

    Median latency 62 ms · Last checked

Explore alternatives to OnlyFonts