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Evidence for your next connection.

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

Read-only probes

MCP server · Code & DevOps

Flagbearer

Feature flags for coding agents: create flags, roll them out gradually and write the flag code.

Checks passed
11 / 22

3 failed · 8 not measured

Median response
513 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
9

Tool definitions returned by this server

Independent monitoring

Health & checks

Status history

Responded

The server completed its last measured handshake. This is an observation, not a guarantee.

Last checked . Not enough checks yet
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?
220
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 513 ms.

  • Pass
    Valid handshake

    protocolVersion 2025-06-18, serverInfo.name flagbearer.

  • Pass
    Lists tools

    tools/list returned 9 tools.

  • Pass
    Current protocol

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

  • Pass
    HTTPS

    The endpoint URL is https.

Performance

  • Not measured
    Fast (p50)

    Median latency 513 ms over 1 samples in 7 days. The bar is 1000 ms. Need at least 5 samples.

  • Not measured
    Consistent (p95)

    95th percentile 513 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

    0 of 23 parameters have a description (0%). The bar is 80%.

  • Fail
    Safety hints

    2 tools set neither readOnlyHint nor destructiveHint.

Publisher

  • Pass
    Verified namespace

    Listed in the Official MCP Registry.

  • Fail
    Website matches publisher

    The website host does not match the reverse-domain namespace.

  • Pass
    Source repo linked

    A 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 2026-11-12T18:05:31.928987Z, within 180 days.

  • Not measured
    Open-source licence

    The GitHub licence lookup has not returned an OSI result yet.

Start using Flagbearer

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 flagbearer https://mcp.flagbearer.dev

Capabilities

Tools 9

check_sdk_setup

What looks wrong with how an application's SDKs are set up, per environment, from what they sent in the last day: flags the code checks that don't exist, wrong or leaked keys, old SDK versions, and environments nothing has connected to. Call this when flags aren't behaving as expected, and after adding flag code and running the app.

Discovered
create_flag

Create a feature flag in an application. It starts off in every environment; use set_flag to turn it on. The key is what code checks, like new-checkout.

Discovered
generate_flag_types

The text of a TypeScript file listing an application's flag keys, so a misspelled key is a type error and editors autocomplete keys. Write the returned text to the path exactly as it is, and commit it. Only for TypeScript projects using @flagbearer/web (React and browser apps), @flagbearer/node or @flagbearer/react-native. Call it when setting up flags in such a project, and again after creating a flag.

Discovered
get_sdk_docs

The current Flagbearer SDK docs for a platform (react, react-native, ios, android, browser, node, python, go, java, dotnet, ruby, rust, cpp or php), plus one environment's SDK address and public client key. Call this before writing code that checks a flag, and follow it.

Discovered
get_user_flags

What a user should have got for every flag in one environment, by email or user key, with the reason (off, tester or rollout and their bucket), what their SDK reported that UTC day (seen), and any changes that day that flipped their result. Use it when a bug report says a feature stopped working, or works for some users and not others. times is a list of ISO timestamps to show side by side, like before and after a report; leave it out for now. An email the SDK saw with several user keys gives one entry per key.

Discovered
list_applications

List the applications in an organization. Flags belong to an application.

Discovered
list_flags

List an application's feature flags with whether each is on, and its rollout percent, in every environment.

Discovered
list_organizations

List the Flagbearer organizations you belong to. Start here to find an organization's ID. This connection only covers the organizations listed. If the project's application isn't in any of them, tell the user before writing flag code, and ask them to reconnect and approve the right organization.

Discovered
set_flag

Turn a flag on or off in one environment, by flag key and environment key. When turning a flag on, rolloutPercent says who gets it: 100 for everyone, or a percentage of users. Ask the user whether it should be on for everyone. Without rolloutPercent it's 0, which turns it on only for the environment's testers. Changing production needs confirmProduction: true. Only send that after the user has confirmed the change.

Discovered

Recent measurements

Probe history

View status
Latest stored probes. Raw probe rows are kept for 90 days.
CheckedResultResponseTools
Connected513 ms9