io.github.growthbook/growthbook-mcp
NPM · @GROWTHBOOK/MCP
Thin MCP server for GrowthBook — skill loader + authenticated API passthrough
Available components
Last scanned (4 hours ago)
Scores higher than 93% of npm servers
Category Developer Tools
How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, and we only credit what we can confirm. How we score → Why this is hard to score →
Supply Chain Security98
- No malware found by supply-chain analysis.Pass
- No known CVEs affecting this package version or its production dependencies.Pass
- No install/post-install scripts declared.Pass
- 30 of 92 dependencies flagged as unhealthy. View diagnostics → Partial
Provenance & Transparency97
- Source repository is publicly reachable at the declared URL. View diagnostics → Pass
- Cryptographically verified build provenance (signed, bound to growthbook/growthbook-mcp). View diagnostics → Pass
- Clear OSI-approved license (MIT).Pass
- Actively maintained (last published 30 days ago).Pass
- Disclosure check failed: no security disclosure policy was found in the source repository. See how to fix → Fail
Schema Quality & AI Usability68
- AI-judged instruction clarity (excellent).Pass
- Context-footprint check failed: tool/resource definitions use about 827 tokens (~206/item across 4 items; 4 tools + 0 resources), over budget; trim descriptions and params. See how to fix → Fail
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management77
- Stability observed for 23 of 30 days with no destabilising changes; credit accrues until the full window elapses.Partial
Tool Coverage100
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 100% of tool parameters carry a description.Pass
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 4 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 5 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
Checks we ran (16)
- Malware scan
- Known CVEs
- Install scripts
- Dependency health
- Source repository
- Provenance
- License
- Maintenance
- Security disclosure
- Schema quality
- Stability
- Tool coverage
- Injection markers
- Destructive annotations
- Judged manipulation
- MCP protocol
Does not apply to this package (2)
- Endpoint SecurityScored on hosted endpoints only. A package has no live endpoint of its own for us to probe.
- Transport & ReachabilityScored on hosted endpoints only. A package has no live endpoint of its own for us to probe.
The score does not measure everything. What the score does not measure →
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 6 Nov 26 +1
- Security disclosure: unverified → fail ▼ functional
- 5 Nov 26 0
- Security disclosure: fail → unverified ▼ functional
- 4 Nov 26 −4
- Stability: pass → 0.70 functional
- 29 Oct 26 0
- Stability: 0.97 → pass security
- 28 Oct 26 0
- Stability: pass → 0.97 functional
- 22 Oct 26 0
- Stability: 0.97 → pass security
- 21 Oct 26 0
- Stability: pass → 0.97 functional
- 17 Oct 26 +3
- Stability: 0.80 → pass security
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 6 Nov 2026 · Analysed npm/@growthbook/mcp@2.2.0
Provenance Verified
A signed build attestation was found and verified, binding this exact artifact to the source repository it claims to come from.
| Result | Verified |
|---|---|
| Ecosystem | npm |
| Reason | Verified |
| Discovered via | Registry attestation endpoint |
| Source repo | growthbook/growthbook-mcp |
| Certificate issuer | https://token.actions.githubusercontent.com |
| Certificate SAN | https://github.com/growthbook/growthbook-mcp/.github/workflows/publish-mcp.yml@refs/tags/v2.2.0 |
| Rekor log index | 3112929999 |
| Predicate type | SLSA build provenance https://slsa.dev/provenance/v1 |
| Subject digest | sha512:2eeb7c64913dfb99280f403918b958da7db528ef7bfb518cd08b83db369eff82b572a1105b5c9dd99cfc9ae047a8d39d124a6851f752f7274f7ffc4fe |
Background: How many MCP packages publish verified provenance →
Dependencies 92 packages
| Packages resolved | 92 |
|---|---|
| Stale | 30 |
| Tree resolution | Complete |
Background: SBOMs and build attestations, explained →
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
growthbook_api_read Read GrowthBook API ~130
Make an authenticated GET request to the GrowthBook REST API. Use path (+ optional query string) exactly as shown in skill workflows that mention gb-call GET. Paths typically start with /api/v1/ or /api/v2/. Returns the raw response body on success. Queries the GrowthBook REST API — see https://docs.growthbook.io/api (OpenAPI: https://api.growthbook.io/api/v1/openapi.yaml).
| Name | Type | Req | Description |
|---|---|---|---|
| path | string | yes | API path including query string if needed, e.g. /api/v1/projects or /api/v2/features/my-flag |
No output schema declared.
No examples provided.
growthbook_api_write Write GrowthBook API ~179
Make an authenticated mutating request (POST, PUT, PATCH, or DELETE) to the GrowthBook REST API. Use method + path (+ optional JSON body) exactly as shown in skill workflows that mention gb-call with those methods. Paths typically start with /api/v1/ or /api/v2/. Returns the raw response body on success. Mutates the GrowthBook REST API — see https://docs.growthbook.io/api (OpenAPI: https://api.growthbook.io/api/v1/openapi.yaml).
| Name | Type | Req | Description |
|---|---|---|---|
| body | string | – | Optional JSON request body as a string (for POST/PUT/PATCH) |
| method | string | yes | HTTP method |
| path | string | yes | API path including query string if needed, e.g. /api/v2/features or /api/v1/experiments/exp_123 |
No output schema declared.
No examples provided.
growthbook_list_skills List GrowthBook Skills ~96
List available top-level GrowthBook skill entry points (name + description). Call growthbook_read_skill with the relevant name. If the returned skill routes to a qualified child path (e.g. feature-flags/references/flag-create), call growthbook_read_skill again with that path. Skills encode how to accomplish GrowthBook tasks well; use growthbook_api_read / growthbook_api_write to execute the REST calls they describe.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
growthbook_read_skill Read GrowthBook Skill ~147
Return the full markdown content of a GrowthBook skill by path. Pass a top-level name from growthbook_list_skills (e.g. feature-flags), or a qualified child path named by a skill (e.g. feature-flags/references/flag-create). Follow the skill's workflow; when it shows `gb-call <METHOD> <PATH> [body]`, use growthbook_api_read for GET and growthbook_api_write for POST/PUT/PATCH/DELETE.
| Name | Type | Req | Description |
|---|---|---|---|
| name | string | yes | Top-level skill name (e.g. feature-flags), or a qualified child path named by a skill (e.g. feature-flags/references/flag-create) |
No output schema declared.
No examples provided.
How do I install the io.github.growthbook/growthbook-mcp server?
io.github.growthbook/growthbook-mcp runs locally as an npm package, launched with npx -y @growthbook/mcp. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
npm · @growthbook/mcp
claude mcp add growthbook-growthbook-mcp -- npx -y @growthbook/mcp
What is the io.github.growthbook/growthbook-mcp server?
io.github.growthbook/growthbook-mcp is listed in the public MCP registry as io.github.growthbook/growthbook-mcp. Thin MCP server for GrowthBook, skill loader + authenticated API passthrough. This page covers its npm package (@growthbook/mcp).
Is the io.github.growthbook/growthbook-mcp server safe to use?
io.github.growthbook/growthbook-mcp scores 90 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 6 November 2026. It declares no install or post-install scripts. Its build provenance is signed and verified. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm.
What tools does the io.github.growthbook/growthbook-mcp server expose?
io.github.growthbook/growthbook-mcp exposes 4 tools: growthbook_api_read, growthbook_api_write, growthbook_list_skills, growthbook_read_skill. Their descriptions and schemas cost roughly 552 tokens of context every time the server is loaded.
Is the io.github.growthbook/growthbook-mcp server still maintained?
io.github.growthbook/growthbook-mcp is still listed as active in the MCP registry. We last reached this channel on 6 November 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.
What licence is the io.github.growthbook/growthbook-mcp server under?
io.github.growthbook/growthbook-mcp declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.
What did VerifyMCP test on the io.github.growthbook/growthbook-mcp server?
VerifyMCP ran 16 checks on io.github.growthbook/growthbook-mcp, covering Malware scan, Known CVEs, Install scripts, Dependency health and 12 more. Endpoint Security and Transport & Reachability do not apply to an npm package, so they were not tested. The score does not measure everything, and the scoring documentation lists what it leaves out.