ValidKit

io.github.OlsOls4Published by GitHub account OlsOls4v1.1.0Updated Oct 24, 2026

Validate IBAN, EU VAT, card numbers, ISBN, BIC, EAN and postcodes

The publisher's own server: Chat With Your Ads

VerifiedStreamable HTTPWeb executableDeveloper ToolsBusiness & Commerce

Overview

AI-generated overview

Remote MCP server that lets an assistant validate IBAN, EU VAT, card, ISBN, BIC, EAN and postcode values through a RapidAPI-hosted API.

What you can do
  • Validate identifiers: check IBAN, EU VAT, card numbers, ISBN, BIC, EAN and postcodes
  • Return validation results for a supplied value through the API's endpoints exposed as tools
  • Call the service over Streamable HTTP with RapidAPI headers
When to use it
Useful when an assistant needs to check whether bank, tax, card, product or address identifiers are well formed, for example while cleaning form input, reviewing invoices or preparing test data.
Requirements
A remote endpoint at the ValidKit RapidAPI host; a RapidAPI account subscribed to ValidKit (free plan available) and its key sent in the X-RapidAPI-Key header, plus the X-RapidAPI-Host header; network access.
Before you install
The X-RapidAPI-Key secret is sent with every request and is tied to your RapidAPI subscription and quota. Card numbers and IBANs are sent to a third-party API, so avoid real payment or account data where possible. Tool list is not published in the manifest, so check the exposed tools before relying on them.

Installation

In SourceWeft

  1. Open ValidKit in the dashboard and add it to a workspace.
  2. Connect Custom headers 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.OlsOls4%2Fvalidkit/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": {
    "validkit": {
      "type": "http",
      "url": "https://validkit-iban-vat-card-isbn-bic-postcode-validator.p.rapidapi.com/mcp",
      "headers": {
        "X-RapidAPI-Key": "<VALUE>",
        "X-RapidAPI-Host": "<VALUE>"
      }
    }
  }
}

README

Developer utility APIs + remote MCP servers

Thirteen small, focused REST APIs for everyday developer jobs: validating emails, phones and IBANs, IP geolocation, PDFs, images, QR codes, fraud scoring, token counting and more. Each one is its own product on RapidAPI with a free plan, full OpenAPI docs, and a built-in remote MCP server so AI agents (Claude, Cursor, VS Code, n8n, LangChain) can call it as tools.

  • Free tier on every API: subscribe on RapidAPI, copy your key, call it.
  • MCP built in: every API exposes Streamable HTTP MCP at https://<host>.p.rapidapi.com/mcp, and each is listed in the official MCP Registry as io.github.OlsOls4/<kit>.
  • No heavy dependencies on your side: plain HTTPS + JSON from any language or no-code tool.

The APIs

APIWhat it doesRapidAPIMCP endpointTutorial
WebKitEmail validation, link previews and article-to-Markdown extraction for AI agentsListinghttps://webkit-email-validator-link-preview-article-extractor.p.rapidapi.com/mcpdev.to
DomainKitDNS records, SSL certificate, WHOIS/RDAP and website tech scan for any domainListinghttps://domainkit-dns-ssl-whois-website-tech-lookup.p.rapidapi.com/mcpdev.to
QRKitGenerate QR codes (URL, WiFi, vCard) and barcodes as PNG/SVGListinghttps://qrkit-qr-code-barcode-generator.p.rapidapi.com/mcpdev.to
TextKitSentiment, language detection, readability, keywords, summaries and profanity filteringListinghttps://textkit-sentiment-language-readability-keywords.p.rapidapi.com/mcpdev.to
PhoneKitPhone number validation, formatting, carrier, line type and timezoneListinghttps://phonekit-phone-number-validation-carrier-line-type.p.rapidapi.com/mcpdev.to
ValidKitValidate IBAN, EU VAT, card numbers, ISBN, BIC, EAN and postcodesListinghttps://validkit-iban-vat-card-isbn-bic-postcode-validator.p.rapidapi.com/mcpdev.to
GeoIPIP geolocation: country, continent, ASN and ISP lookupListinghttps://geoip-ip-geolocation-asn-isp-lookup.p.rapidapi.com/mcpdev.to
DocKitExtract text and metadata from PDFs; convert Markdown or text to PDFListinghttps://dockit-pdf-text-extraction-markdown-to-pdf.p.rapidapi.com/mcpdev.to
FraudKitFraud risk score for signups and orders from email, IP, phone and user-agentListinghttps://fraudkit-fraud-risk-score-for-signups-orders.p.rapidapi.com/mcpdev.to
ImageKitResize, convert to WebP, compress, crop, rotate and strip EXIF from imagesListinghttps://imagekit-resize-convert-to-webp-compress-crop.p.rapidapi.com/mcpdev.to
UK PostcodeKitUK postcode lookup, nearest postcodes, autocomplete and distance (OS open data)Listinghttps://uk-postcodekit-postcode-lookup-nearest-distance.p.rapidapi.com/mcpdev.to
LLMKitToken counting, RAG chunking, truncation, HTML to Markdown and JSON repairListinghttps://llmkit-token-counter-rag-chunker-json-repair.p.rapidapi.com/mcpdev.to
CalKitPublic holidays for 150+ countries, business-day maths and timezone lookupListinghttps://calkit-public-holidays-business-days-timezones.p.rapidapi.com/mcpdev.to

Also available (newer):

  • CurrencyKit: ECB euro reference exchange rates: latest, historical, time series and currency conversion. RapidAPI · MCP https://currencykit-ecb-exchange-rates-currency-converter.p.rapidapi.com/mcp
  • VATKit: Live EU VAT number checks via VIES with company name/address, VAT formats and EU VAT rates. RapidAPI · MCP https://vatkit-eu-vat-number-check-vies-vat-rates.p.rapidapi.com/mcp

Quickstart (REST)

bash
curl -G "https://calkit-public-holidays-business-days-timezones.p.rapidapi.com/business-days/add" \  -d date=2026-12-23 -d days=5 -d country=GB -d subdiv=ENG \  -H "X-RapidAPI-Key: YOUR_RAPIDAPI_KEY" \  -H "X-RapidAPI-Host: calkit-public-holidays-business-days-timezones.p.rapidapi.com"

Swap the host for any API in the table. Every request goes through RapidAPI with X-RapidAPI-Key and X-RapidAPI-Host.

Quickstart (MCP)

Add any API as a remote MCP server in a client that supports Streamable HTTP with custom headers, for example:

json
{  "mcpServers": {    "calkit": {      "type": "http",      "url": "https://calkit-public-holidays-business-days-timezones.p.rapidapi.com/mcp",      "headers": {        "X-RapidAPI-Key": "YOUR_RAPIDAPI_KEY",        "X-RapidAPI-Host": "calkit-public-holidays-business-days-timezones.p.rapidapi.com"      }    }  }}

The server answers tools/list with that API's endpoints as tools.

What's in this repo

  • main.py and one folder per API (webkit, domainkit, qrkit, ...): the FastAPI service behind all listings.
  • mcpserver.py: the MCP layer that turns each API's routes into tools.
  • openapi/: OpenAPI specs for each API.
  • mcp-registry/: server.json files published to the official MCP Registry.

Data and licences

GeoIP and FraudKit use DB-IP Lite (CC BY 4.0). UK PostcodeKit uses OS Code-Point Open (Open Government Licence v3.0; contains OS data © Crown copyright and database right). PhoneKit uses Google libphonenumber (Apache 2.0). Full attributions are in each API's docs on RapidAPI.

Support

Questions, bugs or feature requests: open an issue or use the Discussions tab on the RapidAPI listing.

Source: README.md at commit d186ed8

Tools

0
This server asks for a credential such as an API key, so SourceWeft could not read its tools without one and has not indexed them.

Version history

1
  1. v1.1.0LatestOct 15, 2026

Score

75% of the applicable checks met

How complete this listing is, computed from the registry entry, the endpoint and public sources. Not a rating of the server and not a statement that it is safe or working today: reachability is a dated check, and no installs or reviews go into the score.

  • Reached in the last 30 daysRequired25 pts
  • Auth declaredRequired10 pts
  • Tools listed15 pts

    Answer tools/list without a credential, or ship a package that starts in a sandbox without one.

  • DescriptionRequired15 pts
  • Logo10 pts
  • Documentation15 pts
  • License10 pts

    Declare a license in the repository or the registry entry.

Other Valid integrations

Chat With Your Ads

co.validOfficial publisher

Gives an assistant conversational access to advertising performance data, creative analysis, and campaign insights.

Streamable HTTPWeb executableAuth
Business & CommerceCredential requiredOct 24, 2026

Valid

co.validOfficial publisher

A remote MCP server that gives an assistant conversational access to advertising performance data, creative analysis and campaign insights.

Streamable HTTPWeb executableAuth
Business & CommerceCredential requiredOct 24, 2026

FairValid

Published by GitHub account moonlitnayeem

FairValid verifies email addresses and, through FairMatch, lets an assistant search, quote and unlock verified business leads using workspace credits.

Streamable HTTPWeb executableAuth
Security & MonitoringCredential requiredNov 7, 2026

FabTally Valid

Published by GitHub account zvmzaretsky

A hosted validation suite that lets an assistant check EU VAT numbers, IBANs, email addresses, place names and VINs, with each call paid per use.

Streamable HTTPWeb executable
Finance5 toolsOct 25, 2026