brasil-mcp-leads

MCP stdio client for the Brasil MCP Leads B2B lead-generation API.

Privacy-first lead gen. Enrich Brazilian CNPJs (RFB base + opt-in site scrape + tier-1/2/3 LLM summaries) from your Claude Desktop / Claude Code, bring-your-own LLM via MCP Sampling, credit-billed, LGPD-compliant.

Repo layout — this is a split repo

Two pieces, two licenses, one repo:

This split happened in v0.3.0. Up to and including v0.2.0 the PyPI package shipped the server. From v0.3.0 onward the PyPI package ships only the thin HTTP client. See CHANGELOG.md for the migration story.

Quickstart (client)

1. Install (or just uvx it)

uv tool install brasil-mcp-leads
# or run on demand:
uvx brasil-mcp-leads

2. Configure your MCP client

Claude Desktop (claude_desktop_config.json):

{
  "mcpServers": {
    "brasil-mcp-leads": {
      "command": "uvx",
      "args": ["brasil-mcp-leads"],
      "env": {
        "BRASIL_MCP_LEADS_URL": "https://server.solidapps.tech/brasil-mcp/leads",
        "BRASIL_MCP_LEADS_KEY": "your-api-key-here"
      }
    }
  }
}

Claude Code (.claude/settings.local.json or via claude mcp add):

claude mcp add brasil-mcp-leads \
  --env BRASIL_MCP_LEADS_URL=https://server.solidapps.tech/brasil-mcp/leads \
  --env BRASIL_MCP_LEADS_KEY=your-api-key-here \
  -- uvx brasil-mcp-leads

3. Sign up via MCP (no key yet — v0.3.0+)

BRASIL_MCP_LEADS_KEY is OPTIONAL. The signup tools (request_api_key and check_signup_status) and health work without a key. The lookup tools (lookup_lead / bulk_lookup_leads / sample_leads) return a MISSING_API_KEY envelope until a key is configured.

Typical first-run dialogue from inside Claude:

You: I want to get a Brasil MCP Leads key. Use the free plan.
Claude (calling request_api_key(email="me@example.com", plan="free")):
   Here's your API key: brmcpleads_xxx...
   CRITICAL: Store this api_key NOW — it will NOT be returned again.
   Add it as BRASIL_MCP_LEADS_KEY in your MCP client config and restart.

For paid plans (hobby / starter / pro) the tool returns an Asaas checkout_url and a polling_token. Open the URL in your browser, pay (Asaas hosts the card capture), then call check_signup_status(polling_token) to retrieve the key (also emailed to you as backup).

After saving the key in your MCP client config (e.g. claude_desktop_config.json → env.BRASIL_MCP_LEADS_KEY), restart the client to enable the lookup tools.

Environment variables

Tools exposed (6)

Signup (no API key required)

• request_api_key(email, plan="free", cpf_cnpj?) — start a self-service signup. Free → returns the API key inline (1 key per email lifetime). Paid (hobby / starter / pro) → returns an Asaas checkout_url + polling_token; pay, then poll check_signup_status.
• check_signup_status(polling_token) — poll the paid-flow signup. Returns {status:'pending'} while waiting on Asaas, {status:'paid', api_key, plan, warning} on first call after payment (STORE_KEY_NOW — the key is also emailed as a backup), or {status:'delivered'} on subsequent polls. 410 SIGNUP_EXPIRED if the polling token has aged out.

Lookup (requires BRASIL_MCP_LEADS_KEY)

• lookup_lead(cnpj, deliver?, website_url?) — single-CNPJ lookup. deliver controls base / scrape / summary tier; returns a LeadResponse envelope (empresa, endereco, cnae, contacts_base, contacts_scraped, summary, charged_credits, delivered_skus, credit_balance).
• bulk_lookup_leads(cnpjs, deliver?) — batch lookup (up to 1000 CNPJs). Partial failures contained per-item: each result is {cnpj, result} or {cnpj, error}. Use to enrich existing lists.
• sample_leads(n, filters?, deliver?, exclude_already_sold=True, randomize=True) — filter-based discovery (CNAE / UF / município / porte / capital social / data abertura / has_email / has_corporate_email / has_whatsapp_cached / has_summary_min_tier). Use to discover net-new CNPJs matching your ICP.
• health() — server version + DB ping. Public, no API key needed.

Credits & pricing

• 1 credit per CNPJ delivered with base / base+scrape / base+scrape+summary via caller-LLM (MCP Sampling).
• 2 credits when the summary is sourced from our fallback LLM or the cache.
• Re-deliveries within the 30-day idempotency window are free.

Error envelope

Network/HTTP failures become a JSON envelope so tool callers always see the same shape:

{ "error": { "code": "UPSTREAM_TIMEOUT", "message_pt": "...", "message_en": "..." } }

Codes added by this client:

• UPSTREAM_TIMEOUT — Leads server didn't respond within BRASIL_MCP_LEADS_TIMEOUT.
• UPSTREAM_NETWORK — connection refused, DNS failure, TLS handshake error.
• UPSTREAM_BAD_RESPONSE — Leads server returned non-JSON or unexpected shape.
• MISSING_API_KEY — BRASIL_MCP_LEADS_KEY not configured (query tools only).

All other codes come straight from the upstream Leads API: CNPJ_NOT_COVERED (404), OPT_OUT_BLOCKED (451), PAYMENT_REQUIRED (402), QUOTA_EXHAUSTED (429), SUMMARY_UNAVAILABLE (503), MATCH_AUTH_ERROR (500), MATCH_UNAVAILABLE (503), MISSING_TOKEN / INVALID_TOKEN (401), RATE_LIMITED (429).

Privacy

• The only data that leaves your machine is the CNPJ + the deliver flags + (when filters are supplied) the ICP criteria. No PII inputs from your side.
• LGPD opt-out is propagated from the upstream Match base — opted-out CNPJs return OPT_OUT_BLOCKED with a 451 status.
• Your BRASIL_MCP_LEADS_KEY is sent only as the Authorization: Bearer header against BRASIL_MCP_LEADS_URL. Never logged.
• All HTTPS, no plaintext fallback.
• See the upstream brasil-mcp-match privacy contract for the underlying RF base posture.

Self-hosting the server

If you want to run your own Leads deployment instead of consuming a hosted one, see server/README.md. The server is AGPL-3.0-or-later; running a public-facing instance triggers the source-availability obligation.

License

This published package (src/brasil_mcp_leads/) is MIT. See LICENSE.

The server side (server/) is AGPL-3.0-or-later — see server/LICENSE.

The MIT license on the client is intentional: it lets you embed the stdio client in proprietary stacks while the AGPL server protects the operator-side work from being relicensed downstream.

Related

• brasil-mcp/essentials — Fase 1, MIT.
• brasil-mcp/match — Fase 2, privacy-preserving CNPJ verification.