# Whisper (remote · whisper.online)

One routable IPv6 per AI agent, verifiable from the DNS root. Keyless tools need no signup.

- Trust score: 71/100 (medium)
- Registry status: active
- Liveness: live
- Owner verified: no
- Last scored: 2026-09-25

## Components

- remote · `whisper.online`: 71/100 (this document), [markdown](https://verifymcp.io/servers/whisper-sec-whisper/whisper.md), [page](https://verifymcp.io/servers/whisper-sec-whisper/whisper)
- npm · `@whisper-security/whisper-mcp`: 40/100, [markdown](https://verifymcp.io/servers/whisper-sec-whisper/whisper-security-whisper-mcp.md), [page](https://verifymcp.io/servers/whisper-sec-whisper/whisper-security-whisper-mcp)
- oci · `ghcr.io/whisper-sec/whisper:0.219.2`: 10/100, [markdown](https://verifymcp.io/servers/whisper-sec-whisper/ghcr-io-whisper-sec-whisper-0-219-2.md), [page](https://verifymcp.io/servers/whisper-sec-whisper/ghcr-io-whisper-sec-whisper-0-219-2)

## Channel facts

- Endpoint: `https://whisper.online/mcp`
- Transports: `streamable-http`
- Auth: `none`
- Version: `0.219.4`

## Trust breakdown

How this component scores in each security and reliability category. Every signal is checked automatically against the live server, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog)

Scored 2026-09-25.

- **Endpoint Security**: 77/100
  - The endpoint's TLS certificate is valid, in date, and uses a strong key.
  - No authorisation is required to call this server. Every tool declares its destructiveHint and none is destructive, so open access doesn't expose one.
  - HTTPS is enforced; there's no plaintext access path.
  - HSTS check failed: the Strict-Transport-Security header is absent.
  - DNSSEC is configured correctly; the domain's records validate against the full chain to the root.
- **Transport & Reachability**: 100/100
  - Verified streamable-http transport via a live MCP handshake.
- **Schema Quality & AI Usability**: 76/100
  - AI-judged instruction clarity (good).
  - Tool/resource definitions use about 1787 tokens (~105/item across 17 items; 17 tools + 0 resources), lean.
  - Usage-examples check failed: none of the tools include examples.
- **Stability & Change Management**: 0/100
  - Stability check failed: schema churn in the 1 day we've observed: 3 tool removals, 0 breaking changes, 0 auth/transport breaks, 5 additions.
- **Tool Coverage**: 100/100
  - 100% of tools have a non-trivial description (not blank, and not just the tool's name).
  - 100% of tool parameters carry a description.
- **Tool Safety**: 100/100
  - No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.
  - We read all 17 captured tool definition(s), and no name or description among them implies an irreversible operation.
  - An AI judge read all 18 captured unit(s) of tool text and found none that tries to manipulate the model reading it.
- **Capabilities**: 60/100
  - Spec-recency check failed: implements MCP spec 2025-06-18; the latest is 2026-07-28.

## Install

### How do I install the Whisper MCP server?

Whisper is a hosted endpoint at https://whisper.online/mcp, so there is nothing to install locally. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.

### Claude

```bash
claude mcp add --transport http whisper-sec-whisper 'https://whisper.online/mcp'
```

### Cursor

```json
{
  "mcpServers": {
    "whisper-sec-whisper": {
      "url": "https://whisper.online/mcp"
    }
  }
}
```

### VS Code

```json
{
  "servers": {
    "whisper-sec-whisper": {
      "type": "http",
      "url": "https://whisper.online/mcp"
    }
  }
}
```

### Codex

```toml
[mcp_servers.whisper-sec-whisper]
url = "https://whisper.online/mcp"
```

### opencode

```json
{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "whisper-sec-whisper": {
      "type": "remote",
      "url": "https://whisper.online/mcp",
      "enabled": true
    }
  }
}
```

### OpenClaw

```bash
openclaw mcp add whisper-sec-whisper --url 'https://whisper.online/mcp' --transport streamable-http
```

### Hermes

```yaml
mcp_servers:
  whisper-sec-whisper:
    url: "https://whisper.online/mcp"
```

### Netclaw

```json
{
  "McpServers": {
    "whisper-sec-whisper": {
      "Transport": "http",
      "Url": "https://whisper.online/mcp"
    }
  }
}
```

### Vellum

```bash
assistant mcp add whisper-sec-whisper -t streamable-http -u 'https://whisper.online/mcp'
```

### Other

```json
{
  "mcpServers": {
    "whisper-sec-whisper": {
      "type": "http",
      "url": "https://whisper.online/mcp"
    }
  }
}
```

The mcpServers block is a cross-client convention. Remote transports vary, so check your client's docs.

## Changelog

Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims.

### 2026-09-25 (score 71, 0)

- [functional] We updated how we score, so this day's move reflects our rubric, not a change to the server

### 2026-09-24 (score 71)

First indexed and scored.

## MCP tools (17)

### `whisper_signup` (~120 tokens)

Get a Whisper API key

Start or complete Whisper signup from an email address alone, and receive an API key that unlocks the provisioning and governance skills on this card. Send {"email":"..."} to start; a six-digit code arrives by email; send {"signup_id":"...","code":"123456"} to complete. No human step, no account needed first. Example call: {"skill":"signup","input":{"email":"agent@example.com"}}

Input parameters:

- `input` (object, required): Arguments for this operation, as an object. The example passes {"email":"agent@example.com"}.

### `whisper_verify` (~206 tokens)

Verify a Whisper agent identity

Is this IPv6 address or hostname a real Whisper agent, and whose? Grades the full keyless trust chain: the reverse DNS record, the forward AAAA confirming it back to the same address, and the DANE-EE certificate pin published in DNSSEC-signed DNS. Returns is_whisper_agent with the evidence for the verdict either way, so a negative answer is an answer and not an error. Answers without an API key, and every leg of it is independently checkable from the DNS root with dig. Example call: {"skill":"verify","input":"2a04:2a01:b69a:6717:e3b0:51ff:3bf7:f478"}

Input parameters:

- `input` (string, required): The indicator to look up: a domain, an IP address, an ASN or a file hash. The example passes 2a04:2a01:b69a:6717:e3b0:51ff:3bf7:f478.

### `whisper_rdap` (~169 tokens)

Look up an address in RDAP

The public registration record for any address in Whisper's space, in RFC 9083 form: the handle, the agent's label, its country, and the entities behind it. The same document the RDAP service serves at /ip/{address}, which any RDAP client can already read. Answers without an API key. Example call: {"skill":"rdap","input":"2a04:2a01:b69a:6717:e3b0:51ff:3bf7:f478"}

Input parameters:

- `input` (string, required): The indicator to look up: a domain, an IP address, an ASN or a file hash. The example passes 2a04:2a01:b69a:6717:e3b0:51ff:3bf7:f478.

### `whisper_identify` (~76 tokens)

identify

Identify an indicator (domain, IP, hash, …) against the graph. Answers without an API key. Example call: {"skill":"identify","input":"example.com"}

Input parameters:

- `input` (string, required): The indicator to look up: a domain, an IP address, an ASN or a file hash. The example passes example.com.

### `whisper_assess` (~73 tokens)

assess

Assess the risk/policy posture of one or more indicators. Answers without an API key. Example call: {"skill":"assess","input":"example.com"}

Input parameters:

- `input` (string, required): The indicator to look up: a domain, an IP address, an ASN or a file hash. The example passes example.com.

### `whisper_walk` (~69 tokens)

walk

Walk the graph from an indicator across its relationships. Answers without an API key. Example call: {"skill":"walk","input":"example.com"}

Input parameters:

- `input` (string, required): The indicator to look up: a domain, an IP address, an ASN or a file hash. The example passes example.com.

### `whisper_watch` (~62 tokens)

watch

Watch an indicator for change/activity over time. Answers without an API key. Example call: {"skill":"watch","input":{"action":"list"}}

Input parameters:

- `input` (object, required): Arguments for this operation, as an object. The example passes {"action":"list"}.

### `whisper_explain` (~72 tokens)

explain

Explain a verdict - the evidence and reasoning behind it. Answers without an API key. Example call: {"skill":"explain","input":"example.com"}

Input parameters:

- `input` (string, required): The indicator to look up: a domain, an IP address, an ASN or a file hash. The example passes example.com.

### `whisper_variants` (~70 tokens)

variants

Enumerate variants/permutations of an indicator. Answers without an API key. Example call: {"skill":"variants","input":"example.com"}

Input parameters:

- `input` (string, required): The indicator to look up: a domain, an IP address, an ASN or a file hash. The example passes example.com.

### `whisper_origins` (~71 tokens)

origins

Trace the origins/provenance of an indicator. Answers without an API key. Example call: {"skill":"origins","input":"example.com"}

Input parameters:

- `input` (string, required): The indicator to look up: a domain, an IP address, an ASN or a file hash. The example passes example.com.

### `whisper_history` (~73 tokens)

history

Historical records for an indicator (incl. whois/bgp history). Answers without an API key. Example call: {"skill":"history","input":"example.com"}

Input parameters:

- `input` (string, required): The indicator to look up: a domain, an IP address, an ASN or a file hash. The example passes example.com.

### `whisper_lookupTlsFingerprint` (~101 tokens)

lookupTlsFingerprint

Look up a TLS (JA3/JA4) fingerprint in the graph. Answers without an API key. Example call: {"skill":"lookupTlsFingerprint","input":"ja3:771,4865-4866-4867"}

Input parameters:

- `input` (string, required): The indicator to look up: a domain, an IP address, an ASN or a file hash. The example passes ja3:771,4865-4866-4867.

### `whisper_lookupTorRelay` (~83 tokens)

lookupTorRelay

Look up Tor relay metadata for an address. Answers without an API key. Example call: {"skill":"lookupTorRelay","input":"185.220.101.1"}

Input parameters:

- `input` (string, required): The indicator to look up: a domain, an IP address, an ASN or a file hash. The example passes 185.220.101.1.

### `whisper_asset` (~68 tokens)

asset

Resolve an asset and its catalog of attributes. Answers without an API key. Example call: {"skill":"asset","input":"example.com"}

Input parameters:

- `input` (string, required): The indicator to look up: a domain, an IP address, an ASN or a file hash. The example passes example.com.

### `whisper_threatintel` (~131 tokens)

threatintel

Threat-intelligence indicator family (candidate apex/CDN/hosting). A family verb: name the sub-verb as "sub" alongside the input. Sub-verbs: candidateCdnApex, candidateMultiTenantApex, candidateSharedHostingIp.. Answers without an API key. Example call: {"skill":"threatintel","sub":"candidateCdnApex","input":5}

Input parameters:

- `input` (integer, required): A row limit. The example passes 5.
- `sub` (string, required): Which sub-verb of this family to run. The example runs "candidateCdnApex".

### `whisper_psl` (~149 tokens)

psl

Public-suffix-list family (tld-plus-one, is-public-suffix, affiliation). A family verb: name the sub-verb as "sub" alongside the input. Sub-verbs: tldPlusOne, isPublicSuffix, affiliation.. Answers without an API key. Example call: {"skill":"psl","sub":"tldPlusOne","input":"a.b.example.co.uk"}

Input parameters:

- `input` (string, required): The indicator to look up: a domain, an IP address, an ASN or a file hash. The example passes a.b.example.co.uk.
- `sub` (string, required): Which sub-verb of this family to run. The example runs "tldPlusOne".

### `whisper_topAsnsByPrefixCount` (~61 tokens)

topAsnsByPrefixCount

Top ASNs ranked by announced-prefix count. Answers without an API key. Example call: {"skill":"topAsnsByPrefixCount","input":10}

Input parameters:

- `input` (integer, required): A row limit. The example passes 10.

## Diagnostics

Captured diagnostic sections: TLS, DNSSEC, Authorisation, Transports. The full working is on the page: https://verifymcp.io/servers/whisper-sec-whisper/whisper#diagnostics

## Score history

- 2026-09-25: 71
- 2026-09-24: 71

## Common questions

### What is the Whisper MCP server?

Whisper is an MCP server listed in the public MCP registry as io.github.whisper-sec/whisper. One routable IPv6 per AI agent, verifiable from the DNS root. Keyless tools need no signup. This page covers its hosted endpoint (https://whisper.online/mcp).

### Is the Whisper MCP server safe to use?

Whisper scores 71 out of 100 on VerifyMCP. 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 Whisper MCP server expose?

Whisper exposes 17 tools: whisper_signup, whisper_verify, whisper_rdap, whisper_identify, whisper_assess, and 12 more. Their descriptions and schemas cost roughly 1,654 tokens of context every time the server is loaded.

### Does the Whisper MCP server require authentication?

No. We connected to Whisper without credentials and it answered, so anything it exposes is reachable by anyone who knows the address.

### Is the Whisper MCP server still maintained?

Whisper is still listed as active in the MCP registry. We last reached this channel on 25 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.

## Links

- Remote endpoint: https://whisper.online/mcp
- Repository: https://github.com/whisper-sec/whisper-cli
- Website: https://whisper.online/
- Changelog RSS feed: https://verifymcp.io/servers/whisper-sec-whisper/whisper.xml
- Changelog JSON feed: https://verifymcp.io/servers/whisper-sec-whisper/whisper.json
- HTML version of this page: https://verifymcp.io/servers/whisper-sec-whisper/whisper