CambioKit — Argentina & Brazil data tools for AI agents

Ten read-only tools that give AI agents clean, sourced JSON about Argentina and Brazil. No third-party API keys (you only need an Apify account). Every response includes source (with license/citation) and fetched_at; upstream calls are cached and have automatic fallbacks.

🇦🇷 Herramientas para agentes de IA: dólar oficial/MEP/CCL/blue/cripto, inflación INDEC, feriados, validación de CUIT/CUIL. 🇧🇷 Ferramentas para agentes de IA: PTAX, SELIC, feriados, validação de CPF/CNPJ (inclui CNPJ alfanumérico 2026) e consulta de CEP.

Tool	What it returns	Source (fallback)
ar_dollar_rates	ARS per USD: oficial, blue, MEP, CCL, cripto, mayorista, tarjeta + BCRA reference	DolarApi (Bluelytics) + BCRA
ar_inflation	INDEC national CPI: monthly % and YoY %, up to 120 months	datos.gob.ar Series API
holidays	National holidays AR/BR for a year + next upcoming	ArgentinaDatos / BrasilAPI (Nager.Date)
is_business_day	Weekend/holiday check for a date in AR/BR	same as above
validate_cuit	CUIT/CUIL check digit, formatted, entity type	computed locally
validate_cpf	CPF check digits, formatted	computed locally
validate_cnpj	CNPJ check digits (numeric + alphanumeric)	computed locally
br_cep	Address for a CEP (street, city, state, IBGE)	ViaCEP (BrasilAPI)
br_ptax	Official USD/BRL PTAX (latest or by date)	Banco Central do Brasil
br_selic	SELIC target and daily rate	Banco Central do Brasil (BrasilAPI)

Use as an MCP server (via Apify)

CambioKit runs on Apify, so any MCP client can use it through Apify's hosted MCP server. You only need your Apify API token (Console → Settings → API & Integrations).

Streamable HTTP endpoint:

https://mcp.apify.com/?tools=gleaming_carp/cambiokit

Send your Apify token in an Authorization: Bearer header (clients that support OAuth, such as Claude.ai, can sign in to Apify instead).

Claude Desktop / Cursor config (via mcp-remote):

{ "mcpServers": { "cambiokit": {
    "command": "npx",
    "args": ["-y", "mcp-remote", "https://mcp.apify.com/?tools=gleaming_carp/cambiokit",
             "--header", "Authorization: Bearer ${APIFY_TOKEN}"],
    "env": { "APIFY_TOKEN": "your-apify-token" } } } }

Or run Apify's MCP server locally: npx -y @apify/actors-mcp-server --actors gleaming_carp/cambiokit with APIFY_TOKEN set. Each tool call is billed per event through your Apify account.

Use on Apify

Run the Actor with input {"tool":"ar_dollar_rates","type":"mep"} or a batch: {"calls":[{"tool":"validate_cpf","args":{"cpf":"529.982.247-25"}},{"tool":"br_ptax","args":{}}]}. Agents can also call it through Apify's MCP server (mcp.apify.com). Pricing: pay per successful tool call.

Example output

{ "ok": true, "tool": "validate_cuit",
  "data": { "input": "20-17254359-7", "valid": true, "formatted": "20-17254359-7", "entity_type": "person (male)" },
  "source": [{ "name": "Computed locally (official check-digit algorithm)" }],
  "fetched_at": "2026-10-26T18:21:42.990Z", "cached": false }

Errors: { "ok": false, "error": { "code": "INVALID_INPUT|NOT_FOUND|UPSTREAM_ERROR|ALL_SOURCES_FAILED", "message": "..." } }.

Data attribution

Data: DolarApi https://dolarapi.com · ArgentinaDatos https://argentinadatos.com · INDEC via datos.gob.ar (CC BY 4.0) · BCRA · Banco Central do Brasil (ODbL v1.0) · BrasilAPI · ViaCEP · Nager.Date · Bluelytics. Validators check digits only; they don't confirm a person or company exists. Not financial advice.

License: MIT (code). Data keeps each source's license.