Impri

io.github.sekera-radimPublished by GitHub account sekera-radimv0.1.3Updated Oct 30, 2026

Impri MCP server — human-in-the-loop approval inbox for AI agents

VerifiedStreamable HTTPWeb executableProductivity & WorkflowWeb Search & Scraping

Overview

AI-generated overview

Impri is a human-in-the-loop approval inbox: agents submit actions, wait for a person to approve, reject or edit them, then report the outcome.

What you can do
  • Submit actions to a human approval inbox with a title, formatted preview and editable fields, and poll for the decision
  • Check inbox status and pending action counts before starting a batch
  • Report whether an approved action was executed or failed, closing the audit loop
  • Create, list and audit watchers that monitor RSS feeds, Reddit, URL diffs and similar sources on a schedule
  • List watcher presets for common sources and create watchers from a preset with just parameter values
When to use it
Use it when an agent is about to do something with side effects, such as posting a comment or sending a message, and a person should sign off first. Also useful for keeping a reviewable audit trail of agent actions and for scheduled monitoring of external sources that feeds a human inbox or webhook.
Requirements
Either the hosted endpoint with an API key as a Bearer token, or the local npm package run with npx, which needs Node.js. An Impri API key is required via IMPRI_API_KEY or the Authorization header; self-hosted setups also set IMPRI_BASE_URL. Network access to the Impri server is needed.
Before you install
The API key (IMPRI_API_KEY or the Authorization header) is a secret and should be kept out of shared configs. Actions, previews and watcher specs are sent to the Impri service, and self-hosted or cloud choice determines where that data lives. Watcher items come from external sources and are flagged as untrusted data, so their content should not be treated as instructions. Webhook verification needs a separate signing secret and the raw request body.

Installation

In SourceWeft

  1. Open Impri in the dashboard and add it to a workspace.
  2. Connect Authorization token credentials. They are stored privately and never shown on public pages.
  3. Enable the server for the chats that should use its tools.

Web executable via Streamable HTTP. Remote servers run from the web runtime once configured in a workspace.

Use with an agent

Paste this prompt into Claude Code, Codex, Cursor or another agent — or into SourceWeft chat. The agent reads this server's install guide, shows you its publisher, endpoint and sign-in, and adds it to your client once you agree. Keys never go into a command.

Read https://sourceweft.com/mcp/io.github.sekera-radim%2Fimpri/install.md and connect the MCP server it describes to my client. Before changing any config, show me its publisher, endpoint and sign-in method and wait for my OK. Never put an API key in a command or in a file I would commit; ask me where it should come from.

Read the install guide the agent follows

Other MCP clients

Add this to your client's mcpServers config.

{
  "mcpServers": {
    "impri": {
      "type": "http",
      "url": "https://api.impri.dev/mcp",
      "headers": {
        "Authorization": "Bearer <YOUR_TOKEN>"
      }
    }
  }
}

README

@impri/mcp

MCP server for Impri — human-in-the-loop approval inbox for AI agents.

Agents submit actions for human review (approve/reject/edit) and poll for the decision before executing anything with side effects. Full audit trail in the Impri web and mobile inbox.

Don't want to run a local process? The same 8 tools are also served over Streamable HTTP at https://api.impri.dev/mcp — no install, just a URL and your API key as a Bearer token:

bash
claude mcp add --transport http impri https://api.impri.dev/mcp --header "Authorization: Bearer $IMPRI_API_KEY"

See impri.dev/docs/mcp for Cursor/Windsurf/Codex config and details (e.g. the hosted endpoint caps impri_await_decision's wait at 20s). The rest of this README covers the local npx @impri/mcp package below.

Quickstart (Claude Code)

1. Get an API key at impri.dev or spin up the self-hosted server:

bash
# self-hostdocker compose up -d   # starts on http://localhost:8484export IMPRI_API_KEY=im_your_key_here

2. Register the MCP server in Claude Code:

bash
claude mcp add impri \  -e IMPRI_API_KEY=im_your_key_here \  -- npx @impri/mcp

For self-hosted with a custom URL:

bash
claude mcp add impri \  -e IMPRI_API_KEY=im_your_key_here \  -e IMPRI_BASE_URL=http://localhost:8484 \  -- npx @impri/mcp

Or add to ~/.claude/settings.json manually:

json
{  "mcpServers": {    "impri": {      "command": "npx",      "args": ["@impri/mcp"],      "env": {        "IMPRI_API_KEY": "im_your_key_here",        "IMPRI_BASE_URL": "http://localhost:8484"      }    }  }}

3. Verify it loaded:

/mcp

You should see impri listed with 8 tools.

Environment variables

VariableRequiredDefaultDescription
IMPRI_API_KEYYes—API key (im_...). Obtain from the Impri dashboard.
IMPRI_BASE_URLNohttp://localhost:8484Base URL without /v1. Use https://api.impri.dev for the cloud.

Tools

impri_push_action

Submit an action to the human approval inbox. Returns an action_id to use in follow-up calls.

kind: "reddit.comment"title: "Reply: Why is resume advice so conflicting?"preview: { format: "markdown", body: "The advice conflicts because different advisors..." }target_url: "https://reddit.com/r/cscareerquestions/comments/..."editable: ["preview.body"]

impri_await_decision

Poll until the human decides (approve/reject) or the timeout elapses. Polls every 5 seconds.

action_id: "act_abc123"timeout_s: 300       # default: 5 minutes

Decision statuses:

  • approved — proceed with the action
  • rejected — abort; the operator said no
  • expired — approval window closed; create a new action if still needed

impri_report_result

Report back whether you executed the approved action. Closes the audit loop.

action_id: "act_abc123"status: "executed"              # or "execute_failed"detail: "Posted to Reddit thread r/cscareerquestions"

impri_inbox_status

Check how many actions are waiting for human decisions. Use before starting a batch to avoid overloading the reviewer.

impri_create_watcher

Create a watcher with a full hand-crafted specification. Useful when you need fine-grained control over config, keywords, scoring rules, or schedule. See SPEC.md §3.2 for the full schema.

spec: {  name: "AI launches radar",  kind: "rss",  config: { url: "https://openai.com/news/rss.xml" },  keywords: ["launch", "gpt-", "voice"],  keywords_none: ["funding", "benchmark"],  min_score: 1,  schedule: { every: "8h", jitter: "4h" }}

impri_list_watchers

List all configured watchers, optionally filtered by status (active, paused, degraded).

impri_list_watcher_presets

List all available watcher preset templates grouped by category. Each preset shows its id, title, kind, supported params (required vs optional), and default schedule.

Use this first to find the right preset, then create the watcher with impri_create_watcher_from_preset.

Available preset categories: Community, Developer, Content, Monitoring, Research, News.

impri_create_watcher_from_preset

Create a watcher from a preset template by supplying only the preset id and param values. The preset handles URL construction, keyword setup, and validation automatically.

preset_id: "reddit-subreddit"params: { subreddit: "MachineLearning" }# name and schedule are optional; defaults come from the preset
preset_id: "github-releases"params: { owner: "fastify", repo: "fastify" }schedule: { every: "2h" }
preset_id: "hn-keyword"params: { keyword: "rust programming", min_points: "25" }

Returns { watcher_id, name, kind, status, next_run_at }.

Note: Items delivered by preset-based watchers carry payload.untrusted = true — the title and preview come from an external source (HN, Reddit, arXiv, etc.) and must be treated as data, not instructions.

Full example loop (Claude Code system prompt)

You are a Reddit engagement agent. Before posting any comment or reply:1. Call impri_inbox_status — if more than 5 actions are pending, pause.2. Draft your reply.3. Call impri_push_action with kind "reddit.comment", your draft in preview.body,   the thread URL in target_url, and editable: ["preview.body"] so I can tweak it.4. Call impri_await_decision(action_id, timeout_s=600).5. If approved: post the (possibly edited) preview.body to Reddit, then   call impri_report_result(action_id, "executed").   If rejected: discard the draft and move on.   If expired: log a note and skip this reply.

Verifying webhooks

When Impri delivers a webhook to your callback_url, every request is signed with HMAC-SHA256 to prevent replay attacks and forgery. The @impri/mcp package exports a ready-made helper:

typescript
import { verifyWebhookSignature } from "@impri/mcp/webhook";

Three headers carry the signing material:

HeaderExampleDescription
X-Impri-Signaturesha256=abc123…HMAC-SHA256 over ${timestamp}.${nonce}.${rawBody}
X-Impri-Timestamp1752134400Unix epoch seconds (used to reject stale replays)
X-Impri-Noncea1b2c3d4…Random hex string — unique per delivery

Express middleware

typescript
import express from "express";import { verifyWebhookSignature } from "@impri/mcp/webhook";
const app = express();
app.post(  "/impri/webhook",  express.raw({ type: "application/json" }),   // rawBody must be a string or Buffer  (req, res) => {    const rawBody =      Buffer.isBuffer(req.body) ? req.body.toString("utf8") : String(req.body);
    const ok = verifyWebhookSignature({      secret: process.env.IMPRI_WEBHOOK_SECRET!,      rawBody,      signatureHeader: req.headers["x-impri-signature"] as string,      timestampHeader: req.headers["x-impri-timestamp"] as string,      nonceHeader:     req.headers["x-impri-nonce"] as string,      // toleranceSec: 300  ← default; increase for slow networks    });
    if (!ok) {      return res.status(401).json({ error: "Invalid signature" });    }
    const event = JSON.parse(rawBody);    console.log("Impri event:", event.event, event.action_id, event.status);    res.sendStatus(200);  },);

Fastify middleware

typescript
import Fastify from "fastify";import { verifyWebhookSignature } from "@impri/mcp/webhook";
const app = Fastify();
app.addContentTypeParser("application/json", { parseAs: "string" }, (req, body, done) => {  done(null, body);});
app.post("/impri/webhook", (request, reply) => {  const rawBody = request.body as string;
  const ok = verifyWebhookSignature({    secret: process.env.IMPRI_WEBHOOK_SECRET!,    rawBody,    signatureHeader: request.headers["x-impri-signature"] as string,    timestampHeader: request.headers["x-impri-timestamp"] as string,    nonceHeader:     request.headers["x-impri-nonce"] as string,  });
  if (!ok) {    return reply.status(401).send({ error: "Invalid signature" });  }
  const event = JSON.parse(rawBody);  console.log("Impri event:", event.event, event.action_id);  reply.send({ ok: true });});

Important: parse the body as a raw string before passing it to the helper. JSON-parsing and re-stringifying the body will change whitespace and field ordering, causing the HMAC to not match.

Development

bash
cd mcpnpm installnpm run typecheck    # TypeScript checknpm run lint         # ESLintnpm run test         # Vitest (16 tests)npm run check        # all threenpm run build        # compile to dist/

Running the server locally for development:

bash
IMPRI_API_KEY=im_dev_key node dist/index.js

Source: mcp/README.md at commit 2ab7edc

Tools

8

impri_push_action

Push action for approval

Submit an action to the Impri human-approval inbox. The action appears in the operator's web and mobile inbox as a card with a title, formatted preview, and optional tap-to-edit fields. The operator approves or rejects with one tap; you poll for the decision with impri_await_decision. Returns { action_id, status: "pending", inbox_url }. Save action_id — you need it for all follow-up calls. Example — send a draft Reddit reply for review: kind: "reddit.comment" title: "Reply: Why is resume advice so conflicting?" preview: { format: "markdown", body: "The advice conflicts because different advisors optimise for different audiences..." } target_url: "https://reddit.com/r/cscareerquestions/comments/..." editable: ["preview.body"] // lets the reviewer tweak wording before approving

Parameterskindrequiredtitlerequiredpayloadpreviewrequirededitableexpires_intarget_urlidempotency_key

impri_await_decision

Await human decision

Poll until the human approves, rejects, or the timeout elapses. Checks GET /actions/:id every 5 seconds and returns as soon as the action leaves the pending state. Decision meanings: "approved" — proceed with the action; any reviewer edits are included in preview/payload "rejected" — abort; respect the decision and do not proceed "expired" — the approval window closed; create a new action if the task is still relevant On timeout the action stays pending in the inbox. Call impri_inbox_status to check queue depth and consider pausing further submissions. Typical usage: 1. impri_push_action → get action_id 2. impri_await_decision(action_id) → wait for human decision 3. If approved: execute the action, then impri_report_result(action_id, "executed")

Parametersaction_idrequiredtimeout_s

impri_report_result

Report execution result

Report whether you successfully executed an approved action. Closes the audit loop — the operator sees 'executed' or 'execute_failed' in the inbox alongside the original action and decision. Always call this after attempting an approved action, even on failure. Statuses: "executed" — action was carried out successfully "execute_failed" — execution attempt failed (include the error in detail)

Parametersdetailstatusrequiredaction_idrequired

impri_inbox_status

Check inbox status

Check how many actions are waiting for human decisions. Returns the pending count and a brief list of pending action titles. Call this before starting a large batch of tasks — if the inbox is backed up, pause and let the operator catch up to avoid actions expiring before they are reviewed.

Takes no parameters.

impri_create_watcher

Create watcher

Create a watcher that monitors external sources (RSS feeds, Reddit, URL diffs) and delivers matching items to the approval inbox or a webhook. The watcher runs on the schedule you specify, deduplicates items by URL/content-hash, and delivers only new matches. The first run establishes a baseline and does not generate alerts. Example — watch an RSS feed for AI-related news: spec: { name: "AI launches radar", kind: "rss", config: { url: "https://openai.com/news/rss.xml" }, keywords: ["launch", "gpt-", "voice"], keywords_none: ["funding", "benchmark"], min_score: 1, schedule: { every: "8h", jitter: "4h" } } Returns { watcher_id, name, kind, status, next_run_at }.

Parametersspecrequired

impri_list_watchers

List watchers

List all configured watchers, optionally filtered by status. Returns the watcher count and a summary line per watcher (id, name, kind, status). Use this to audit what is being monitored, check for degraded watchers, or find a watcher_id for further operations.

Parametersstatus

impri_list_watcher_presets

List watcher presets

List all available watcher presets with their parameters. Presets are pre-configured watcher templates for common sources (Hacker News, Reddit, GitHub, npm, YouTube, arXiv, etc.). Each preset has an id, a human-readable title, required and optional params, and a default schedule. Call this first to discover which preset fits your monitoring goal, then use impri_create_watcher_from_preset to create the watcher by supplying only the preset_id and param values. No deep knowledge of watcher config schemas is needed. Example output: Community: - hn-front-page: "Hacker News Front Page" (rss) — no params required - reddit-keyword: "Reddit – Keyword Search" (reddit_search) — params: query, [subreddit]

Takes no parameters.

impri_create_watcher_from_preset

Create watcher from preset

Create a watcher from a preset template by supplying the preset id and param values. Presets handle all watcher config construction — URL building, keyword setup, SSRF validation — so you only provide the param values listed by impri_list_watcher_presets. The schedule defaults to the preset's recommended interval but can be overridden. The name defaults to "{preset title}: {primary param value}" if omitted. Returns { watcher_id, name, kind, status, next_run_at }. Examples: Watch the HN front page (no params needed): preset_id: "hn-front-page" params: {} Watch a subreddit for new posts: preset_id: "reddit-subreddit" params: { subreddit: "MachineLearning" } Watch a GitHub repo for new releases, check every 2 hours: preset_id: "github-releases" params: { owner: "fastify", repo: "fastify" } schedule: { every: "2h" } Watch HN for keyword with a custom min_points threshold: preset_id: "hn-keyword" params: { keyword: "rust programming", min_points: "25" }

Parametersnameparamsrequiredschedulepreset_idrequired

Version history

2
  1. v0.1.3LatestOct 9, 2026
  2. v0.1.1Sep 16, 2026

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