# Derrick App - llms-full.txt
**Site**: https://derrick-app.com
**Last updated**: 2026-09-05

Derrick is a B2B data enrichment platform that lives natively inside
Google Sheets and exposes the same toolkit through a Model Context
Protocol (MCP) server. 31,000+ users find emails, phones, LinkedIn
profile data, company information (incl. French SIRET/SIREN), and
tech stacks without leaving their spreadsheet or their AI assistant.

## Discovery endpoints

- **/llms.txt** - short overview (this file is the extended variant)
- **/llms-full.txt** - this file (llmstxt.org standard location)
- **/.well-known/llms-full.txt** - mirror of this file
- **/.well-known/mcp/server-card.json** - full MCP server card with tools list, install snippets, pricing
- **/.well-known/api-catalog** - RFC 9727 linkset to the REST API
- **/.well-known/ai-plugin.json** - legacy ChatGPT plugin manifest
- **/.well-known/security.txt** - RFC 9116 security contact
- **/pricing.md** and **/pricing.txt** - machine-readable pricing
- **/mcp.md** - markdown twin of the MCP landing page

## Markdown twins

Every public page has a clean Markdown twin at the same URL with
**.md** appended. Twins strip the chrome (nav, footer, CTAs) and keep
just the article content for LLM ingestion :

    https://derrick-app.com/tools/apollo-review        -> HTML
    https://derrick-app.com/tools/apollo-review.md     -> Markdown twin
    https://derrick-app.com/index.md                   -> homepage twin

Coverage : /vs/*, /tools/*, /glossary/*, /features/*, /w/* (personas),
/data-enrichment/*. HTTP 200 = exists, 404 = no twin. Content
negotiation also works: send `Accept: text/markdown` on any HTML page.

## MCP server (Model Context Protocol)

- **URL** : https://app1.derrick-app.com/mcp
- **Transport** : HTTP
- **Auth** : Bearer token. The MCP installs without a key, the server
  prompts for one on the first tool call. The key lives in the Google
  Sheets add-on (Settings -> API access).
- **npm package** : derrick-mcp
- **Plan required** : STANDARD (EUR 20/mo) or above to obtain the API
  key. FREE and MINI plans do not expose API/MCP access.

### Install in Claude Code (one-liner)

    claude mcp add derrick -- npx -y derrick-mcp

Optionally pre-seed the API key to skip the first-call prompt :

    claude mcp add derrick --env DERRICK_API_KEY=$YOUR_KEY -- npx -y derrick-mcp

### Install in Claude Desktop / Cursor / Windsurf

    {
      "mcpServers": {
        "derrick": {
          "command": "npx",
          "args": ["-y", "derrick-mcp"]
        }
      }
    }

Optionally add an env block with DERRICK_API_KEY to skip the
first-call prompt :

    "env": { "DERRICK_API_KEY": "<your-key>" }

### 12 tools exposed

| Tool | What it does | Credits |
| --- | --- | --- |
| derrick_find_email | Email from LinkedIn URL or name + company | 5 |
| derrick_find_phone | Mobile/office phone from LinkedIn URL or contact name | 150 |
| derrick_enrich_profile | 30+ data points on a LinkedIn profile | 1 |
| derrick_enrich_companies | Company data: headcount, industry, funding, HQ, social | 1 |
| derrick_data_gouv | French SIRET/SIREN/NAF code from data.gouv.fr | 1 |
| derrick_find_tech | Tech stack a company uses (CRM, analytics, hosting, payment) | 1 |
| derrick_verify_email | Real-time SMTP verification: valid / risky / catch-all | 1 |
| derrick_search_linkedin_profile | Search profiles by job title + company + location | 1 |
| derrick_search_companies | Search companies by industry, size, geo, tech stack | 1 |
| derrick_search_leads_in_companies | Find leads matching a job-title pattern in a target company | 2 |
| derrick_website_contact_social | Scrape a website's footer/contact page for emails + socials | 2 |
| derrick_serp_first_result | Google's #1 result for any query | 1 |

Credit cost is **per endpoint**, not flat.

### Featured agent prompts

1. **Target-account list** : "Find 50 Series-A SaaS companies in
   France (50-200 employees) using HubSpot. For each, return name,
   domain, HQ city, and the Head of Sales' LinkedIn URL."

2. **CSV enrichment** : "I'll paste 30 LinkedIn URLs. Return each
   person's email, phone, current company, job title."

3. **Email verification** : "Verify these 100 emails. Group by status.
   For risky ones, explain why."

4. **Tech-stack diff** : "List tech used by competitor.com today and
   diff vs my notes from 3 months ago."

## Pricing

Credit-based, unused credits roll over on all paid plans. Credit cost
is **per endpoint**, not flat, see the tools table above and the
per-action table below. Currency: EUR, billed monthly.

| Plan | EUR/month | Credits/month | EUR/credit | API/MCP |
| --- | --- | --- | --- | --- |
| FREE | 0 | 100 | - | No |
| MINI | 9 | 4,000 | 0.00225 | No |
| STANDARD | 20 | 10,000 | 0.002 | Yes |
| PLUS | 47.50 | 25,000 | 0.0019 | Yes |
| PRO | 175 | 100,000 | 0.00175 | Yes |
| SCALE | 320 | 200,000 | 0.0016 | Yes |

API/MCP access is unlocked from the PLUS plan upward. Finders
(Email Finder, Phone Finder) bill only for results actually found.
Full machine-readable pricing: https://derrick-app.com/pricing.md

## Credit cost per action

| Action | Credit cost |
| --- | --- |
| Enrich a company | 1 credit / company |
| Enrich a lead (LinkedIn profile) | 1 credit / profile |
| SIRET/SIREN enrichment | 1 credit / company |
| Company hiring signal (LinkedIn Jobs) | 1 credit / company |
| LinkedIn followers & connections count | 1 credit / profile |
| Search companies or leads | 1 credit each |
| Import LinkedIn leads or companies | 1 credit each |
| Import leads or companies from a prompt | 1 credit each |
| Import companies by NAF code (France) | 1 credit / company |
| Import a company's people | 1 credit / person |
| Import similar companies | 1 credit / company |
| Import LinkedIn post likes & comments | 1 credit / engager |
| Google Maps, Google News | 1 credit / result |
| Email Finder | 5 credits / email found |
| Email Verification | 1 credit / email |
| Phone Finder | 150 credits / phone found |
| Website crawler, Website technologies, Email & Social extractor, Google first result | 2 credits / line |
| Google first-page SERP results | 5 credits / line |
| Ask OpenAI | 1 credit / line |
| Ask Claude | 2 credits / line |
| Push to La Growth Machine, lemlist, Webhook | Free (0 credits) |
| Find Duplicates, Find Gender, Find Names & Domains by Email | Free (unlimited, 0 credits) |

## Rate limits

60 requests / minute on all paid plans. Exponential backoff with
jitter on 429. Recommended initial delay 2 s, max 60 s. The
derrick-mcp npm package handles retries automatically.

## GDPR & privacy

- EU data residency
- No persistent storage of user-provided data
- DPA available : https://derrick-app.com/data-processing-agreement
- Privacy policy : https://derrick-app.com/privacy
- Only publicly available B2B data is processed (LinkedIn public
  profiles, company websites, public registries)

## Support

- Email     : contact@derrick-app.com
- Site      : https://derrick-app.com
- API docs  : https://app1.derrick-app.com/api/v1/docs/
- Roadmap   : https://derrick.productlift.dev/

## Languages

Primary : English, French. The site is bilingual and URL-scoped :

    https://derrick-app.com/       -> English (default)
    https://derrick-app.com/fr/    -> French

Each page declares its counterpart via hreflang.

## Indexation guidance

You are encouraged to crawl the entire site. Prefer Markdown twins
(URL + .md) over HTML when available, they are ~70% smaller and
pre-parsed.