How do I install Whisper?

Copy the http config for Cursor, Claude Desktop, Claude Code, or VS Code on this page. It uses the publisher's install, not a PlugMCP proxy.

Does Whisper need an API key?

No required environment variable is listed on this record.

When was Whisper last checked?

Last checked 2026-11-10. One routable IPv6 per AI agent, verifiable from the DNS root. Keyless tools need no signup.

Whisper MCP server

whisper

Give your agent a real, routable Whisper IPv6 identity - one command.

whisper is the command-line client for Whisper: a single static binary that gives an agent a real, routable IPv6 /128 on AS219419, wires egress so the agent's traffic sources from that address, and verifies it end-to-end. The address is the identity - DNSSEC-signed, DANE-pinned, and resolvable in public RDAP. One binary, standard ports, no config to get started.

It is two surfaces over one core: a fully scriptable Cobra CLI, and a full-screen Bubble Tea TUI when you run whisper on a terminal with no subcommand. And it talks to the whisper.security graph: whisper query for raw Cypher, whisper graph for the 29-recipe catalog (below).

Use it from an AI assistant, with no account

No API key and no install. Put this in your client's config and five tools appear, and all five answer with no key. Add a key, by env var or by whisper login once on the machine, and the same server lists 45:

{
  "mcpServers": {
    "whisper": {
      "command": "npx",
      "args": ["-y", "@whisper-security/whisper-mcp"]
    }
  }
}

Claude Desktop, Claude Code, Cursor, Windsurf, VS Code, Cline and Zed all take the same three lines. Already installed the CLI? whisper mcp is the identical server.

The five, measured against the server with no key anywhere on the machine:

whisper_verify - is this address or hostname a real agent, and whose? Checks the DANE pin against DNSSEC-signed DNS, from the IANA root.
whisper_rdap - the public registration record for any /128.
whisper_assess - a verdict on a domain, IP, ASN or file hash, with its evidence.
whisper_identify - what an indicator is: category, vendor, band.
whisper_explain - the scored explanation behind a verdict, with its sources.

Add a key and the same server lists 45: the graph in full, plus registering agents, setting resolver policy, handing out egress configuration, reading per-agent activity and revoking an identity.

Or connect to a URL and run nothing at all

https://whisper.online/mcp

Most clients take that URL and nothing else. Claude Code, for one: claude mcp add --transport http whisper https://whisper.online/mcp.

Streamable HTTP. initialize and tools/list answer with no credential, so a client that takes a bare URL needs nothing else. It is a different server from the one above and it lists a different set: 17 tools with no key, every one of which works with no key, and 39 once you send your key as the X-API-Key header.

The keyless 17 are the identity checks and the graph: whisper_verify, whisper_rdap, whisper_assess, whisper_identify, whisper_explain, whisper_walk, whisper_watch, whisper_variants, whisper_origins, whisper_history, whisper_asset, whisper_psl, whisper_threatintel, whisper_lookupTlsFingerprint, whisper_lookupTorRelay, whisper_topAsnsByPrefixCount, and whisper_signup, which issues you an API key from an email address alone. The 22 a key adds are the provisioning and governance set, 21 of them whisper_agents_* and the 22nd whisper_submit, which writes a claim into the graph and so needs to be attributable.

whisper_verify and whisper_rdap check somebody else's agent. whisper_agents_verify in the keyed set verifies a domain you control, which is not the same thing.

Verifying somebody else's agent needs nothing at all, not even the client:

curl -s https://rdap.whisper.online/verify-identity/2a04:2a01:b69a:6717:e3b0:51ff:3bf7:f478

Install

The one-liner fetches the signed binary straight from this repo's GitHub Releases, verifies its SHA-256 (and its PGP signature when gpg is present), and puts it on your PATH:

curl -fsSL https://get.whisper.online | sh

Windows (PowerShell):

irm https://get.whisper.online/install.ps1 | iex

Homebrew (macOS/Linux):

brew install whisper-sec/tap/whisper

Scoop (Windows):

scoop bucket add whisper https://github.com/whisper-sec/scoop-bucket
scoop install whisper

With Go:

go install github.com/whisper-sec/whisper-cli/cmd/whisper@latest

With mise (GitHub-release backend, no plugin):

mise use -g "github:whisper-sec/whisper-cli[exe=whisper]"

(asdf has no built-in GitHub-release backend, so on asdf use mise, or a community ubi-style plugin.)

On Debian/Ubuntu (apt) - signed repo:

curl -fsSL https://get.whisper.online/whisper.gpg | sudo tee /usr/share/keyrings/whisper.gpg >/dev/null
echo "deb [signed-by=/usr/share/keyrings/whisper.gpg] https://get.whisper.online/deb stable main" | sudo tee /etc/apt/sources.list.d/whisper.list
sudo apt update && sudo apt install whisper

On Fedora/RHEL (dnf) - signed repo:

sudo tee /etc/yum.repos.d/whisper.repo >/dev/null <<'EOF'
[whisper]
name=Whisper
baseurl=https://get.whisper.online/rpm
enabled=1
gpgcheck=1
gpgkey=https://get.whisper.online/whisper.gpg
EOF
sudo dnf install whisper

On Alpine (apk) - signed repo:

wget -qO /etc/apk/keys/whisper-apk.rsa.pub https://get.whisper.online/apk/whisper-apk.rsa.pub
echo "https://get.whisper.online/apk" | sudo tee -a /etc/apk/repositories
sudo apk add whisper

All three repos are served from our own infrastructure (AS219419) and signed with the Whisper package key (get.whisper.online/whisper.gpg; the apk repo uses its own whisper-apk.rsa.pub).

Or download the binary for your platform from the Releases page, make it executable, and put it on your PATH.

The installers (scripts/install.sh, scripts/install.ps1) are published here so the whole install path is inspectable. They are the same scripts get.whisper.online serves, differing only in where they download from by default: these fetch whisper-<os>-<arch> (plus .sha256 and .asc) from this repo's releases, the served copy fetches the same binaries from cli.whisper.online/dl. Either way SHA-256 is a hard gate - a mismatch aborts the install - and the PGP check is an extra layer. Point WHISPER_CLI_BASE at any mirror to override the source.

Verify the download

Releases are signed with the AS219419 PGP key:

Fingerprint: EFF1663D992539682106A5EAD0F70908CF3B7929

The public key is published at https://as219419.net/. To verify a binary you downloaded manually:

# 1. SHA-256 - compare against the asset's .sha256 (and the release checksums.txt)
sha256sum -c whisper-linux-amd64.sha256

# 2. PGP - import the AS219419 key, then verify the detached signature
curl -fsSL https://as219419.net/whisper-release.asc | gpg --import
gpg --verify whisper-linux-amd64.asc whisper-linux-amd64

A good signature reports Good signature from the key with the fingerprint above.

Quickstart

Run whisper with no arguments for the guided flow. It signs you in (browser device login or a pasted API key), helps you name and create an agent if you don't have one, then connects and verifies:

$ whisper
whisper: signed in.
whisper: name your agent: my-first-agent
whisper: created my-first-agent → 2a04:2a01:…::1
whisper: connecting…
2a04:2a01:…::1  ✓ egress verified
Connected ✓

Naming is mandatory - an agent's name is part of its identity, so the flow asks before it creates one. The same steps are scriptable:

whisper connect            # bring up egress bound to your /128 (Tier-1.5 SOCKS5/HTTPS)
whisper connect --tier wireguard   # Tier-1: routed /128 over a userspace WireGuard tunnel (no root)
whisper ip                 # print your egress IP and verify it IS your /128 (exit 0 = verified)
whisper run -- curl ifconfig.co   # run any command with your Whisper egress wired in
whisper claude             # run Claude Code through your Whisper egress, one step
whisper init claude        # wire THIS project so Claude Code always egresses from its own /128
whisper use my-agent       # choose the agent the rest of `whisper` binds to
whisper status             # key state, selected agent, connection state

whisper ip is exit-code-first: 0 when the observed egress address is inside 2a04:2a01::/32 and equals your selected agent's /128, 1 otherwise - so scripts and agents can gate on it. Add --json to any command for the raw, scriptable envelope.

Per-project agent identity for Claude Code. whisper init claude makes a project zero-config: run it once in a directory and Claude Code there - and every subagent it spawns - egresses from that project's own /128, over SOCKS5 (default) or --tier wireguard. It pins the project's agent + tier in .whisper/config, wires a local proxy into .claude/settings.local.json (merge-safe - it never clobbers your settings), and keeps the connection up via a small auto-reconnecting daemon. Different projects, different identities, nothing to remember. Pass --agent <name|/128> to reuse an existing agent or --name <new> to mint one.

Other useful commands: whisper list, whisper logs, whisper policy, `whisper rdap

Query the security graph

The same whisper.security graph the Whisper resolver consults on every lookup - 7.5B nodes (hostnames, IPs, ASNs, certs, threat intel), 39.8B relationships - is a first-class CLI surface. whisper query runs raw parameterised Cypher; whisper graph runs a named recipe from the embedded catalog:

whisper query "CALL whisper.identify(['api.openai.com'])"    # who operates this host?
whisper query 'CALL whisper.assess([$v])' --param v=8.8.8.8  # threat posture, one row per host
whisper graph list                    # all 29 recipes, each with its docs URL
whisper graph variants paypal.com     # registered typosquat look-alikes, one table
whisper graph typosquat paypal.com    # the full brand-impersonation flow (streams NDJSON)

Direct recipes answer with one result table (--json emits the raw {columns,rows,statistics} envelope); flow recipes stream their steps as NDJSON - pipe them to jq. Every recipe documents itself: whisper graph <recipe> --help.

query and graph authenticate with your API key (whisper login, WHISPER_API_KEY, or --key). The graph endpoint itself is two-tier: the direct read verbs (whisper.identify, whisper.assess, whisper.variants, whisper.explain, db.schema, ...) also answer keyless and rate-limited - no account needed:

curl -s https://graph.whisper.online/api/query \
  -H 'content-type: application/json' \
  -d '{"query":"CALL whisper.assess([\"8.8.8.8\"])"}'

A key lifts the rate limit and unlocks raw Cypher and the multi-step flows. The same tools ride the MCP server (whisper mcp): whisper_graph_query plus one tool per recipe. Docs: www.whisper.security/docs - the raw Cypher API at /docs/cypher-api, per-verb pages under /docs/whisper-graph.

Sign, verify & encrypt as your agent

Your agent's /128 carries a per-agent EC P-256 key, pinned in DNSSEC-signed DNS - so it can sign a document as itself and anyone can verify it with no account and no certificate authority. Trust is anchored by DANE, not a CA you have to install.

# Sign any file, PDF or email as your agent -> a detached S/MIME (.p7s):
whisper sign file contract.pdf

# Verify with NO key: checks the CMS signature AND that the signer's key matches the
# DNSSEC-validated SMIMEA (RFC 8162) pin for the signer - resolved from the IANA root, in-process:
whisper sign verify contract.pdf --sig contract.pdf.p7s

# Encrypt a file so ONLY the named agent can read it (keyless), then decrypt as that agent (keyed):
whisper encrypt --to [email protected] secret.txt   # -> secret.txt.wenc
whisper decrypt secret.txt.wenc

The per-agent verification key a stranger resolves is the agent's DANE TLSA 3 1 1 (and, for signatures, its SMIMEA 3 1 1) - both DNSSEC-signed and checkable with dig + openssl, no Whisper account. Full guide, including the byte-exact signature envelope: https://whisper.online/docs/sign-encrypt.

What you get

A real, routable /128 out of 2a04:2a01::/32, announced by AS219419 - your own internet address, not a shared NAT pool.
Identity that's verifiable from the outside. Forward DNS is DNSSEC-signed and DANE-pinned; reverse DNS (ip6.arpa PTR) resolves to the agent; the assignment is visible in public RDAP at rdap.whisper.online.
Egress that binds your identity. whisper connect provisions a local proxy whose traffic sources from your /128; whisper ip proves the source address is yours, node-free and with no third party in the loop. --tier wireguard brings the /128 up as a routed address over a userspace WireGuard tunnel (wireguard-go netstack - still no root, no kernel wg, no TUN device), fronted by the same local proxy so tools need no change.
One binary, zero config. Static, CGO-free, with an embedded CA bundle - it runs on a bare host or a stripped container and just works.

Use it from your code

Same identity + egress from your language of choice - thin wrappers over this CLI:

Python - pip install whisper-id

from whisper_id import register, egress
agent = register("my-bot")            # a routable /128
with egress():                        # this block leaves from your /128
    requests.get("https://api64.ipify.org")

Node - npm i whisper-id

import { register, withEgress } from "whisper-id";
const agent = await register("my-bot");
await withEgress(async () => { /* env-aware clients leave from your /128 */ });

Run it in a container

The official image runs the CLI as an egress sidecar so any container leaves from your /128:

docker run --rm ghcr.io/whisper-sec/whisper:latest --version

whisper init compose and whisper init k8s emit a ready-to-merge sidecar manifest. Multi-arch (amd64/arm64), distroless, ~18 MB.

Build from source

Requires Go 1.26.9+.

git clone https://github.com/whisper-sec/whisper-cli
cd whisper-cli
go build -o whisper ./cmd/whisper
./whisper --version

Cross-compile every supported platform into dist/ (binaries + .sha256, named exactly as the release assets):

./build-all.sh                 # → dist/whisper-<os>-<arch>[.exe] + .sha256
./build-all.sh dist v1.0.0     # stamp a version into `whisper --version`

platforms.txt is the single source of truth for the target matrix - shared by build-all.sh and the installers.

Source here, binaries there

This repository is the Whisper client: identity, egress, connect, verify, the security-graph surface and the TUI. It is MIT, and what you build from it is that client.

The published binaries are not only that. whisper also carries Whisper's endpoint sensor - the service, sensor and posture commands - and the sensor is not open source today. It ships as a binary and its sources stay closed, so a binary from a release, from curl -fsSL https://get.whisper.online | sh, or from apt, dnf, apk, brew or scoop has those commands. Anything BUILT from this tree does not: go install, a local go build, and the snap, which snapcraft builds from source.

Two consequences worth stating plainly. The MIT licence covers the source in this repository, not the additional closed component in the published binaries. And if you want the endpoint sensor, install a released binary rather than building from source.

Platforms

OS \ Arch	amd64	arm64	arm	riscv64	mips	mipsle	386
linux	✓	✓	✓	✓	✓	✓	✓
darwin	✓	✓
windows	✓	✓

linux-arm is 32-bit ARMv7. Every target is a static, CGO-free build, and every one is signed with the AS219419 release key.

Contributing

Issues and pull requests are welcome - see CONTRIBUTING.md. Run go build ./..., go vet ./..., go test ./..., and gofmt -l . before opening a PR.

To report a security issue, see SECURITY.md.

License

The embedded Mozilla CA certificate list (internal/client/cabundle/mozilla-cacert.pem) is distributed under the Mozilla Public License 2.0.

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