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Toolrail MCP server

Which servers in the official MCP registry are Toolrail's own, whether they answer, and what they offer. A program checked each of these, nobody copied them from a product page.

read 2026-10-26

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Whose server it is
  • Registry namedev.toolrail/mcpverified in the MCP registry

The registry name sits under toolrail.dev. The registry only lets a publisher use that namespace after proving control of the domain through DNS or HTTP.

When we asked itchecked 2026-10-26
  • Stateanswerschecked 2026-10-26
  • Tools28
  • Server calls itselftoolrail
  • Server version1.0.0
  • Protocol version2025-06-18

On 2026-10-26 the server answered initialize and tools/list without a sign-in. First answer in 53 ms.

Should an agent connect itNot proven either way yet
  • Its tools do every use case we checked: convert Chilean UF-indexed amounts into local currency; validate Chilean RUT tax IDs before saving records; calculate business days using the Chilean national calendar.
  • Checked on 1 of the 7 days it takes to judge reliability.

Once connected

  • For "convert Chilean UF-indexed amounts into local currency", the likely first call is cl_uf.
  • For "validate Chilean RUT tax IDs before saving records", the likely first call is cl_rut.
  • For "calculate business days using the Chilean national calendar", the likely first call is cl_dias_habiles.
  • Parameters are untyped or undescribed in 20 of 28 tools: check arguments before calling.

Said by rules from the measurements above. The likely first call is a model's pick from the tool list; read its description before relying on it.

Measured dailydaily checks: 1, the first on 2026-10-26
  • INITE MCP scoreafter a weeka score needs 7 daily checks: 1 so far
  • What an agent can do with it3 of 3 use cases
  • Answeredmeasuring1 of the 7 daily checks it takes to print a share
  • Median first answer160 ms
  • Space in an agent's context≈ 2,933 tokensthe definitions of all its tools (28), which an agent carries on every turn
  • Tool definitionsC · 71 of 100
  • Typed results0 of 28 toolsdeclared outputSchema: results come typed, read once
  • Parameters without a description: in 20 of 28
  • Not saying whether it only reads or can destroy: 28 of 28

What an agent can do with it

  • can do · convert Chilean UF-indexed amounts into local currency
  • can do · validate Chilean RUT tax IDs before saving records
  • can do · calculate business days using the Chilean national calendar

Each of the product's use cases, put to Jev against this server's tool list: can an agent do it with these tools?

Worth a look

None of the five warning signs in these definitions.

A program checks the server once a day: initialize and tools/list, no model. Tokens are the definitions' length at about four characters a token. The grade averages six checks of every tool's name, description, schema and annotations; it says how well the tools are described, not whether they work. The score weighs what was measured and nothing else: answering (30%), doing the product's job (25%), definitions (20%), context (10%) and use (15%). A part that was not measured is left out, and a hidden instruction caps the score at 40. The state of vendors' MCP servers: method and numbers →

Tools it offers28 tools · read 2026-10-26
  • vat_rates

    Current VAT rates for supported European countries (reviewed vatnode open dataset). Free MCP demo; for production volume use GET /vat/rates via x402 (https://toolrail.dev/skill.md).

  • vat_validate

    Validate an EU VAT number against the official VIES registry. Free MCP demo; for production volume use POST /vat/validate via x402 (https://toolrail.dev/skill.md).

  • vat_price

    Compute net/gross price with EU VAT for a given country. Free MCP demo; for production volume use POST /vat/price via x402 (https://toolrail.dev/skill.md).

  • fx_convert

    Convert between 30+ currencies using official ECB reference rates. Free MCP demo; for production volume use GET /fx/convert via x402 (https://toolrail.dev/skill.md).

  • fx_rates

    Full ECB reference rate table for a base currency. Free MCP demo; for production volume use GET /fx/rates via x402 (https://toolrail.dev/skill.md).

  • days_holidays

    Public holidays for supported countries via Nager.Date. Free MCP demo; for production volume use GET /days/holidays via x402 (https://toolrail.dev/skill.md).

  • days_business_days

    Add N business days to a date, respecting official holidays, for supported countries. Free MCP demo; for production volume use GET /days/business-days via x402 (https://toolrail.dev/skill.md).

  • validate_iban

    Validate an IBAN (ISO 13616 mod-97, 88 countries). Free MCP demo; for production volume use POST /validate/iban via x402 (https://toolrail.dev/skill.md).

  • validate_phone

    Validate and format a phone number (~240 regions). Free MCP demo; for production volume use POST /validate/phone via x402 (https://toolrail.dev/skill.md).

  • validate_tax_id

    Validate a LATAM/Spain tax ID: RUT (CL), CUIT/CUIL (AR), CPF/CNPJ (BR), RFC (MX), RUC (PE), NIT (CO), NIF/NIE (ES). Free MCP demo; for production volume use POST /validate/tax-id via x402 (https://toolrail.dev/skill.md).

  • latam_indexacion

    LATAM inflation-indexed units: UF (Chile), UVA (Argentina), UVR (Colombia), UDI (Mexico). Free MCP demo; for production volume use GET /latam/indexacion via x402 (https://toolrail.dev/skill.md).

  • latam_iva

    VAT (IVA/IGV/ITBIS) rates for 17 Latin American countries, with net-to-gross or gross-to-net calculation. Omit pais for the full table. Free MCP demo; for production volume use GET /latam/iva via x402 (https://toolrail.dev/skill.md).

  • latam_unidades_tributarias

    Annual tax units: UIT (Peru), UVT (Colombia), UMA (Mexico). Official value for a date with its legal act; converts N units to local currency. Free MCP demo; for production volume use GET /latam/unidades-tributarias via x402…

  • latam_dolar_argentina

    Argentine dollar quotes: oficial, blue (parallel) and the gap percentage. Free MCP demo; for production volume use GET /latam/dolar-argentina via x402 (https://toolrail.dev/skill.md).

  • latam_fx

    All official LATAM exchange rates vs USD in one call: CLP, ARS, BRL, MXN, COP, PEN. Free MCP demo; for production volume use GET /latam/fx via x402 (https://toolrail.dev/skill.md).

  • br_indices

    Brazil's SELIC, CDI, IPCA and PTAX dollar (Banco Central do Brasil). Free MCP demo; for production volume use GET /br/indices via x402 (https://toolrail.dev/skill.md).

  • br_cep

    Brazilian postal code (CEP) lookup: street, city, state. Free MCP demo; for production volume use GET /br/cep via x402 (https://toolrail.dev/skill.md).

  • ar_indices

    Argentina's monthly/annual inflation and country risk (riesgo país). Free MCP demo; for production volume use GET /ar/indices via x402 (https://toolrail.dev/skill.md).

  • co_trm

    Colombia's official TRM (legal COP/USD exchange rate). Free MCP demo; for production volume use GET /co/trm via x402 (https://toolrail.dev/skill.md).

  • pe_tipo_cambio

    Peru's official SBS exchange rate (BCRP). Free MCP demo; for production volume use GET /pe/tipo-cambio via x402 (https://toolrail.dev/skill.md).

  • mx_indicadores

    Mexico's official FIX dollar rate and TIIE 28-day rate (Banxico). Free MCP demo; for production volume use GET /mx/indicadores via x402 (https://toolrail.dev/skill.md).

  • cl_reajuste

    Chilean IPC adjustment: compound official inflation between two months. Free MCP demo; for production volume use GET /cl/reajuste via x402 (https://toolrail.dev/skill.md).

  • cl_indicadores

    Chilean economic indicators: UF, UTM, dolar, euro, IPC. Free MCP demo; for production volume use GET /cl/indicadores via x402 (https://toolrail.dev/skill.md).

  • cl_uf

    Convert between UF and Chilean pesos at any date. Free MCP demo; for production volume use GET /cl/uf via x402 (https://toolrail.dev/skill.md).

  • cl_dias_habiles

    Chilean business-day calculator, respecting national holidays. Free MCP demo; for production volume use GET /cl/dias-habiles via x402 (https://toolrail.dev/skill.md).

  • cl_feriados

    Official Chilean public holidays for 2026-2027. Free MCP demo; for production volume use GET /cl/feriados via x402 (https://toolrail.dev/skill.md).

  • cl_rut

    Validate and format a Chilean RUT (modulo 11 check digit). Free MCP demo; for production volume use POST /cl/rut via x402 (https://toolrail.dev/skill.md).

  • cl_sueldo_liquido

    Chilean net salary calculator: gross to net with AFP, health, cesantía and impuesto único. Free MCP demo; for production volume use POST /cl/sueldo-liquido via x402 (https://toolrail.dev/skill.md).

How to connect

Add the server to your MCP client config. Claude Desktop, Cursor and most other clients read this shape:

{
  "mcpServers": {
    "toolrail": {
      "type": "http",
      "url": "https://toolrail.dev/mcp"
    }
  }
}

Add it

Claude Code, in a terminal

claude mcp add --transport http toolrail https://toolrail.dev/mcp

Add to CursorAdd to VS Code

claude.ai, ChatGPT and other clients: add https://toolrail.dev/mcp as a custom connector in the settings.

OpenAPI spec

31 paths, read 2026-10-26. Open the spec ↗

Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.