Atlas / MCP servers / signoz / SigNoz

SigNozCAUTION

mcp/signoz/signoz-1

MCP Server for SigNoz

Verdict
CAUTION
Grade
C
Trust score
74 /100
Exposed tools
—
Transport
stdio · streamable-http
License
Apache-2.0
Stars
125
01

Overview

From the repository's own README, as read at the audited commit. Badges and raw HTML are left out.

[](https://golang.org) [](LICENSE) [](https://modelcontextprotocol.io)

A Model Context Protocol (MCP) server that provides seamless access to SigNoz observability data through AI assistants and LLMs. Query metrics, traces, logs, alerts, dashboards, and services using natural language.

[📖 Full Documentation](https://signoz.io/docs/ai/signoz-mcp-server/)

Table of Contents

  • Connect to SigNoz Cloud
  • Self-Hosted Installation
  • Connect to Self-Hosted SigNoz
  • MCP Protocol Compatibility
  • What Can You Do With It?
  • Available Tools
  • Environment Variables
  • Claude Desktop Extension
  • End-to-End Tests
  • Architecture
  • Contributing

Connect to SigNoz Cloud

Connect your AI tool to SigNoz Cloud's hosted MCP server. No installation is required; just add the hosted MCP URL and authenticate.

https://mcp..signoz.cloud/mcp
Make sure you select the correct region that matches your SigNoz Cloud account. Using the wrong region will result in authentication failures. Find your region under Settings → Ingestion in SigNoz, or see the SigNoz Cloud region reference.

One-Click Install Links

GitHub does not reliably make custom-protocol links like cursor:// and vscode: clickable in README rendering.

Use the documentation page for one-click install buttons:

  • [Open one-click install links for Cursor](https://signoz.io/docs/ai/signoz-mcp-server/#install-in
Read from source at commit 21d203fa903cOBSERVED · 2026-10-07
02

Connect

Built from this server's own package name, version and transport as found in its source — not copied from anyone's documentation, so it cannot drift against a page we do not control. Replace the environment placeholders with a token scoped to the least it needs.

claude-code (oci)
claude mcp add signoz-mcp-server:v0.15.0 -- docker run -i --rm docker.io/signoz/signoz-mcp-server:v0.15.0:None
03

Trust audit

CAUTIONgrade C · trust 74/100 Install with care. The audit found things worth knowing before you trust its output.

LayerWhat it checksResult
L0Provenance & inventoryPASS
L1Static analysis of the codeWARN
L2Instruction surface (what it tells the agent)PASS
L3Class-specific surfacePASS
L4Behavioural (sandbox)SKIPPED

What the source does

Filesystem
none-observed
Network
declared (3 observation(s))
Shell
none-observed
Dependencies
pinned
Secrets in source
found

Findings (24)

MEDIUMHard-coded secrets · secret.generic · CWE-798, CWE-321
internal/client/notification_channels_test.go:150
const secret = "never-log-this-token"
MEDIUMHard-coded secrets · secret.stripe · CWE-798, CWE-321
internal/handler/tools/errs_test.go:356
"sk_live_suggestioncanary123456",
MEDIUMHard-coded secrets · secret.stripe · CWE-798, CWE-321
internal/handler/tools/errs_test.go:359
"sk_live_detailcanary123456",
MEDIUMHard-coded secrets · secret.stripe · CWE-798, CWE-321
internal/handler/tools/errs_test.go:360
"sk_live_detailhintcanary123456",
LOWInventory / provenance · inv.hidden_file · CWE-1104
.goreleaser.yaml
.goreleaser.yaml
Why it matters. hidden member outside the usual dotfiles
Fix. review its purpose
LOWInventory / provenance · inv.symlink · CWE-1104
AGENTS.md
AGENTS.md
Why it matters. link not followed
LOWNetwork egress · net.metadata_ip · CWE-200, CWE-319
pkg/util/allowlist_test.go:74
"169.254.169.254", // SSRF target blocked once an allowlist is set
Why it matters. cloud metadata endpoint: the classic SSRF credential grab
LOWNetwork egress · net.raw_ip · CWE-200, CWE-319
guardrails/README.md:66
server --url http://127.0.0.1:<port>/mcp \
LOWNetwork egress · net.raw_ip · CWE-200, CWE-319
internal/config/config_test.go:115
{"http://0.0.0.0:3301", "not allowed"},
LOWNetwork egress · net.raw_ip · CWE-200, CWE-319
internal/docs/verification_test.go:632
return &localHTTPTestServer{URL: "http://127.0.0.1", handler: handler}
LOWNetwork egress · net.raw_ip · CWE-200, CWE-319
internal/mcp-server/server_test.go:277
url:  "https://1.1.1.1:443",
LOWNetwork egress · net.raw_ip · CWE-200, CWE-319
internal/mcp-server/server_test.go:278
want: "https://1.1.1.1",
LOWPrompt injection · prompt.transfer_instruction · CWE-94, CWE-1427
CLAUDE.md:114
never print or persist credentials, report which fields round-tripped server-side, and prefer
Why it matters. an instruction to move sensitive data to an outside destination
Fix. remove; a skill never needs the user's secrets off the machine
LOWPrompt injection · prompt.transfer_instruction · CWE-94, CWE-1427
docs/architecture.md:195
Since tokens are self-contained encrypted blobs, any server instance with the same `OAUTH_TOKEN_SECRET` can validate any token. No sticky sessions or shared state needed. The only requirement is that
Why it matters. an instruction to move sensitive data to an outside destination
Fix. remove; a skill never needs the user's secrets off the machine
LOWPrompt injection · prompt.transfer_instruction · CWE-94, CWE-1427
plans/analytics.md:830
The Streamable HTTP transport runs stateless (`WithStateLess(true)`; see [architecture.md](architecture.md)) — no `Mcp-Session-Id` is issued and there is no server-owned session lifecycle to report. T
Why it matters. an instruction to move sensitive data to an outside destination
Fix. remove; a skill never needs the user's secrets off the machine
LOWPrompt injection · prompt.transfer_instruction · CWE-94, CWE-1427
plans/observability-refactor.context.md:140
This is materially different from the post-decrypt OAuth paths (`handleAuthorizationCodeGrant`, `handleRefreshTokenGrant`, `issueTokenPair`), where `signozURL` comes out of an encrypted token the **se
Why it matters. an instruction to move sensitive data to an outside destination
Fix. remove; a skill never needs the user's secrets off the machine
LOWPrompt injection · prompt.transfer_instruction · CWE-94, CWE-1427
plans/official-go-sdk-migration.plan.md:544
- `README.md`: supported protocol-era/transport table, `server/discover` and legacy initialize behavior, stateless POST-only endpoint, no session ID, and unchanged client configuration.
Why it matters. an instruction to move sensitive data to an outside destination
Fix. remove; a skill never needs the user's secrets off the machine
LOWInventory / provenance · mcp.no_tools_extracted · CWE-1104
server.json
Why it matters. the tool list is enumerated at runtime by tools/list, not declared in source
Fix. the page says so rather than showing an empty table
INFOInventory / provenance · inv.oversize · CWE-1104
internal/docs/assets/corpus.gob.gz
internal/docs/assets/corpus.gob.gz
Why it matters. 1300399 bytes not read
INFOPrompt injection · prompt.credential_read · CWE-94, CWE-1427
docs/architecture.md:204
When OAuth is enabled, the middleware first tries to decrypt an `Authorization` Bearer token as a server-issued OAuth access token; a valid one unwraps to a stored API key forwarded via `SIGNOZ-API-KE
Why it matters. asks the agent to read credentials
INFOPrompt injection · prompt.credential_read · CWE-94, CWE-1427
plans/2026-09-17-released-feature-parity-232.md:276
finds it. Use read-only queries and never persist credentials.
Why it matters. asks the agent to read credentials
INFOPrompt injection · prompt.credential_read · CWE-94, CWE-1427
plans/official-go-sdk-migration.context.md:331
assigning viewer access or creating/revoking credentials.
Why it matters. asks the agent to read credentials
INFOPrompt injection · prompt.credential_read · CWE-94, CWE-1427
plans/upstream-error-guidance.plan.md:113
read-only, avoid logging credentials, and report whether a real recognized
Why it matters. asks the agent to read credentials
INFOPrompt injection · prompt.credential_read · CWE-94, CWE-1427
plans/wire-contract-budget.context.md:69
- Do not retry or route around the policy. Ask the user for explicit approval after disclosing the risk. If approved, keep the routing suite non-executing and run only a separately identified read-onl
Why it matters. asks the agent to read credentials

Gates applied: no_behavioural_pass.

Audited 2026-10-07 · audit v0.4.1 · source sha 21d203fa903cfull audit observations/trust-audit/mcp-server/signoz__signoz-1.json · Report an issue / request a re-scan
04

Audit history

Every audit this server has had. A grade with a past is a grade somebody is still checking.

DateSourceVerdictGradeScoreChange
2026-10-0721d203fa903cCAUTIONC74first audit
05

Questions

What is the SigNoz MCP server?

MCP Server for SigNoz

Is SigNoz safe to connect to an agent?

With care. The audit graded it C (74/100) and found 24 things worth knowing before you trust this server, listed below with the exact line each was found on.

What credentials does SigNoz need?

It reads GITHUB_TOKEN from the environment. Give it a token scoped to the least it needs — an agent that can be talked into calling a tool can be talked into calling it with your credentials.

How does SigNoz run?

It speaks stdio and streamable-http, so it runs as a local process your client starts. It is published on npm as signoz-mcp-protocol-ci at 1.0.0.

How current is this page?

The grade is for one exact copy of the source (21d203fa903c), read on 2026-10-07. The repository is watched and re-audited when it changes.

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