Signet MCP Tools
NPM · @SIGNET-AUTH/MCP-TOOLS · SCANNED SEP 22
MCP server exposing Signet cryptographic signing, verification, and content hash tools over stdio.
Available components
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
- 31 of 96 dependencies flagged as unhealthy. View diagnostics → Partial
Provenance & Transparency48
- Source repository is publicly reachable at the declared URL. View diagnostics → Pass
- Provenance check failed: no build-provenance attestation is published. See how to fix → View diagnostics → Fail
- Clear OSI-approved license (Apache-2.0 OR MIT).Pass
- Actively maintained (last published 137 days ago).Pass
- Publishes a security disclosure policy (SECURITY.md).Pass
Schema Quality & AI Usability78
- AI-judged instruction clarity (excellent).Pass
- Tool/resource definitions use about 283 tokens (~70/item across 4 items; 4 tools + 0 resources), lean.Pass
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management97
- Stability observed for 29 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 4 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
How do I install the Signet MCP Tools server?
Signet MCP Tools runs locally as an npm package, launched with npx -y @signet-auth/mcp-tools. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
npm · @signet-auth/mcp-tools
claude mcp add prismer-ai-signet-mcp-tools -- npx -y @signet-auth/mcp-tools
{
"mcpServers": {
"prismer-ai-signet-mcp-tools": {
"command": "npx",
"args": [
"-y",
"@signet-auth/mcp-tools"
]
}
}
} {
"servers": {
"prismer-ai-signet-mcp-tools": {
"command": "npx",
"args": [
"-y",
"@signet-auth/mcp-tools"
]
}
}
} codex mcp add prismer-ai-signet-mcp-tools -- npx -y @signet-auth/mcp-tools
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"prismer-ai-signet-mcp-tools": {
"type": "local",
"command": [
"npx",
"-y",
"@signet-auth/mcp-tools"
],
"enabled": true
}
}
} openclaw mcp add prismer-ai-signet-mcp-tools --command npx --arg -y --arg @signet-auth/mcp-tools
mcp_servers:
prismer-ai-signet-mcp-tools:
command: "npx"
args: ["-y", "@signet-auth/mcp-tools"] {
"McpServers": {
"prismer-ai-signet-mcp-tools": {
"Transport": "stdio",
"Command": "npx",
"Arguments": [
"-y",
"@signet-auth/mcp-tools"
]
}
}
} assistant mcp add prismer-ai-signet-mcp-tools -t stdio -c npx -a -y @signet-auth/mcp-tools
{
"mcpServers": {
"prismer-ai-signet-mcp-tools": {
"command": "npx",
"args": [
"-y",
"@signet-auth/mcp-tools"
]
}
}
} 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.
- 22 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 93 to 97. That category is still filling its 30-day observation window: 28 days of observed history at the previous scan, 29 at this one. The score rises as the window fills, whether or not the server changes.
- 20 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 87 to 90. That category is still filling its 30-day observation window: 26 days of observed history at the previous scan, 27 at this one. The score rises as the window fills, whether or not the server changes.
- 18 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 80 to 83. That category is still filling its 30-day observation window: 24 days of observed history at the previous scan, 25 at this one. The score rises as the window fills, whether or not the server changes.
- 17 Sept 26 −3
- Stability: pass → 0.80 functional
- 16 Sept 26 0
- Stability: 0.97 → pass security
- 15 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 93 to 97. That category is still filling its 30-day observation window: 28 days of observed history at the previous scan, 29 at this one. The score rises as the window fills, whether or not the server changes.
- 13 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 87 to 90. That category is still filling its 30-day observation window: 26 days of observed history at the previous scan, 27 at this one. The score rises as the window fills, whether or not the server changes.
- 11 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 80 to 83. That category is still filling its 30-day observation window: 24 days of observed history at the previous scan, 25 at this one. The score rises as the window fills, whether or not the server changes.
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 22 Sept 2026 · Analysed npm/@signet-auth/mcp-tools@0.4.1
Provenance No attestation
The registry publishes no build provenance for this version, so there is nothing to verify.
| Result | No attestation |
|---|---|
| Ecosystem | npm |
Background: How many MCP packages publish verified provenance →
Dependencies 96 packages
| Packages resolved | 96 |
|---|---|
| Stale | 31 |
| 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 →
signet_content_hash ~54
Compute SHA-256 hash of canonical JSON (RFC 8785 JCS). Accepts any JSON value.
| Name | Type | Req | Description |
|---|---|---|---|
| content | – | yes | JSON content to hash (object, array, string, number, boolean, or null) |
No output schema declared.
No examples provided.
signet_generate_keypair ~36
Generate a new Ed25519 keypair. Returns only the public key. Use Signet CLI to manage secret keys securely.
Input schema present but exposes no named parameters.
No output schema declared.
No examples provided.
signet_sign ~122
Sign an action (tool call) with an Ed25519 key, producing a cryptographic receipt. Uses SIGNET_SECRET_KEY env var if set, otherwise requires secret_key argument.
| Name | Type | Req | Description |
|---|---|---|---|
| params | – | – | Tool parameters (any JSON value) |
| secret_key | string | – | Base64 secret key (optional if SIGNET_SECRET_KEY env is set) |
| signer_name | string | yes | Agent name |
| signer_owner | string | – | Agent owner (optional) |
| target | string | – | Target MCP server URI |
| tool | string | yes | Tool name being called |
No output schema declared.
No examples provided.
signet_verify ~71
Verify a Signet receipt signature. Returns {valid: true/false}. Accepts both bare base64 and ed25519:-prefixed public keys.
| Name | Type | Req | Description |
|---|---|---|---|
| public_key | string | yes | Public key (base64 or ed25519:base64) |
| receipt_json | string | yes | Receipt JSON string |
No output schema declared.
No examples provided.
What is the Signet MCP Tools server?
Signet MCP Tools is listed in the public MCP registry as io.github.Prismer-AI/signet-mcp-tools. MCP server exposing Signet cryptographic signing, verification, and content hash tools over stdio. This page covers its npm package (@signet-auth/mcp-tools).
Is the Signet MCP Tools server safe to use?
Signet MCP Tools scores 85 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 22 September 2026. It declares no install or post-install scripts. 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 Signet MCP Tools server expose?
Signet MCP Tools exposes 4 tools: signet_generate_keypair, signet_sign, signet_verify, signet_content_hash. Their descriptions and schemas cost roughly 283 tokens of context every time the server is loaded.
Is the Signet MCP Tools server still maintained?
Signet MCP Tools is still listed as active in the MCP registry. We last reached this channel on 22 September 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 Signet MCP Tools server under?
Signet MCP Tools declares the Apache-2.0 OR MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.