Plaud Dev API: register devices, upload audio to Plaud storage and transcribe it with Plaud's speech models.
Plaud ships in the w6w first-party pack. It declares 7 actions, 2 health checks, and the host runs its code in a sandbox that never sees the credential.
io.w6w.plaudPlaud makes AI voice recorders, and its Dev API (Plaud Embedded) lets a company build the recording and transcription into its own product. This app covers the parts of that API a workflow can call from a server: the cloud device registry (bind, unbind, read a device’s binding state), audio upload to Plaud storage, and asynchronous transcription with language, speaker and custom-vocabulary options.
It is built for pipelines that turn conversation audio into text: upload or point at a recording, submit it, poll until it is done, and hand the transcript and its time-aligned segments to the next step. It authenticates as a Plaud partner application (client id and secret key from the Plaud developer portal) acting as one end user, and the app mints and renews the 24-hour user token itself. Transcription needs the application’s separate API key.
It does not record, pair, or read recordings from a personal Plaud account. The Bluetooth half of binding and the recording itself belong to Plaud’s mobile Embedded SDK, and a personal account’s recordings are reachable only through Plaud’s MCP and CLI, which sign in as a person.
Three routes to the same 7 actions. The Workflow tab is generated from Plaud's own manifest and carries its real ids, so it is copy-pasteable; the Code and CLI examples are the same call for any action on any app, so every app-specific value in them is a blank you fill in.
device-bind Register a Plaud device to this connection's user in Plaud's cloud registry. This is only the cloud half of binding: the on-device (Bluetooth) bind is done by the Embedded SDK in a mobile app. Re-binding to the same owner is idempotent; a device bound to another account answers 403.
device-binding-get Read a device's remote binding state and every client id it was previously bound to (including other apps). `isBound` is three-state: true = bound to another account, false = unbound, null = never bound.
device-unbind Remove a device's owner association in Plaud's cloud registry. Pair it with the SDK's on-device unbind in the mobile app. Unbinding an already-unbound device is idempotent.
transcription-get Read a transcription task's status and, once it is SUCCESS, the transcript text, language, duration and time-aligned segments. PENDING, RECEIVED, STARTED and PROGRESS mean keep polling; FAILURE and REVOKED are terminal. Results are retained for 7 days by default.
transcription-submit Start an asynchronous transcription of a publicly reachable audio file (M4A, MP3 or WAV) — either a URL you host or the download URL from Complete an audio upload. Poll with Get a transcription. Recordings over 5 hours should be split. Needs the connection's transcription API key, and Plaud documents the Transcription API as unlocked only after a device has been bound through the Embedded SDK.
upload-complete Merge the uploaded parts into one file and get its download URL (valid about 24 hours), which can be passed to Submit audio for transcription.
upload-presign Begin a multipart upload to Plaud storage and get one presigned S3 URL per 5 MB chunk. Uploading the chunk bytes themselves is done by the caller (PUT each chunk to its URL, no auth, and keep each ETag response header), then finish with Complete an audio upload. Optional: the Transcription API accepts any public audio URL.
A workflow step names the app and the action, and the editor fills in the
connection when you pick one. This is the Step shape from the
workflow spec, carrying Plaud's real ids.
{
"manifestVersion": "2",
"name": "plaud-example",
"steps": [
{
"id": "device-bind",
"uses": {
"app": "io.w6w.plaud",
"action": "device-bind",
"connection": "conn_YOUR_CONNECTION_ID"
},
"with": {
"sn": "<sn>"
}
}
]
}device-bind device-binding-get device-unbind transcription-get transcription-submit +2 more actions available
Every app-specific value here is a blank you have to fill in. An
app action is reached through the connection that authenticates it, so the
address is a connection id, not the app id — and connections belong to your account,
so a public page cannot know yours. Create one for Plaud, then fill in
the three blanks: conn_YOUR_CONNECTION_ID, the action key, and the
parameters that action declares. The call itself is real — the shape is transcribed
from the studio's own snippet builder, which prints the same kind of blanks — but
nothing in it is specific to Plaud. The Workflow tab is where this app's
real ids are.
npm install @w6w/sdkyarn add @w6w/sdkpnpm add @w6w/sdkdeno add npm:@w6w/sdkimport { W6wClient, isActionRun } from "@w6w/sdk";
// Reads W6W_BASE_URL and W6W_TOKEN from the environment when omitted.
const client = new W6wClient();
const envelope = await client.run({
urn: "conn_YOUR_CONNECTION_ID",
action: "device-bind",
payload: {
sn: "<value>",
// type: "<value>",
},
});
if (isActionRun(envelope)) console.log(envelope.value); npm install -g @w6w/cli w6w run conn_YOUR_CONNECTION_ID --action device-bind --payload '{"sn":"<value>"}' Give an AI agent Plaud — without giving it Plaud's credentials. One MCP endpoint exposes every app, function and workflow the caller is entitled to, as tools it can discover and run. Access is granted per team while we onboard.
One tool call{
"name": "w6w_invoke",
"arguments": {
"ref": "app:io.w6w.plaud#device-bind",
"input": {
"sn": "<sn>"
}
}
}
Every tool names its target with a single ref. The
app: form above doesn't name a connection at all — the
host resolves which of the caller's Plaud connections to sign
with, and refuses rather than guesses when the answer is ambiguous.
The token is attached host-side, at the moment of the call. It is never a tool argument, never in the model's context, and never in a transcript — so a prompt injection has nothing to exfiltrate.
Tools are derived per end user from what that person has actually connected and is entitled to — not one shared bot identity carrying the union of everyone's access.
Multi-step work runs on the workflow engine and returns a run handle the agent can poll — retries, branching and state survive the conversation that started them.
Plaud's declared health checks are on the surface too, so an agent can tell "the vendor is down" from "your credential expired" before it burns a retry on either.
The MCP surface is part of the hosted platform. Plaud itself is MIT, and the runtime that executes it is source-available (FSL).
Plaud declares its own checks, so its health is a property of the app rather than something the host guesses at.
Page-level status from status.plaud.ai (Instatus), with component detail.