FastCAC

com.fastcac/cacfastcac.comstreamable-httpv1.0.0Scanned 46 minutes ago

Nigeria CAC tools: name checks, fees, annual returns, register search, TIN, NIN requests.

10 tools: 5 change things and 5 only read.

Reads private data · 0
Reads text others write · 7
Can send data out · 0
2 findings

Anlyon alternative

5 of these tools change something. Run those as governed actions.

Declare what an action changes, and Anlyon puts it under a shared limit, binds every approval to the exact request, and grades the outcome. It works on any HTTPS API you can describe as an action.

Anlyon does not run, proxy or govern this MCP server. A tool your own code calls directly is not routed through Anlyon and is not governed by it.

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Tools

Grouped by what each tool does, most consequential first. Open one for its reasons and full description; descriptions are the publisher's own words.

10 tools

Changes things 5Creates or changes something that can be changed back.Claude Code: ask

calculate_cac_feesCAC's official registration fees, line by line, for a business name, a limited company (by authorised share capital, default ₦1,000,000) or an NGO (Incorporated Trustees).No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Description, as the server wrote it
CAC's official registration fees, line by line, for a business name, a limited company (by authorised share capital, default ₦1,000,000) or an NGO (Incorporated Trustees). Use it for any question about what CAC charges to register. These are government fees, not FastCAC's price.
Annotations the server declares
- openWorldHint: false
- readOnlyHint: true
- title: Calculate CAC registration fees
check_annual_returnsFor a CAC business name: which annual returns are due from its registration date, which are overdue, CAC's estimated charge, and when the next one is due.No findings
Why it is in this group
- Nothing in its name or description says what it does, so it is counted as a write.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
Description, as the server wrote it
For a CAC business name: which annual returns are due from its registration date, which are overdue, CAC's estimated charge, and when the next one is due. Ask for the registration date (it's on the certificate). Without the date, point them to the annual returns checker page, which looks it up by BN number.
Annotations the server declares
- openWorldHint: false
- readOnlyHint: true
- title: Work out annual returns due
check_business_name_complianceRun a proposed business name and its exact CAC line of business through CAC's own compliance and similarity checker.Reads text others write1 finding
Why it is in this group
- The description's first verb is "run": a word for a change.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Findings
- Warn
  The server marks "check_business_name_compliance" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
  Matched text
  annotations: {"readOnlyHint":true,"openWorldHint":true}; The description's first verb is "run": a word for a change.
  What this check looks for
Description, as the server wrote it
Run a proposed business name and its exact CAC line of business through CAC's own compliance and similarity checker. Returns compliance/similarity scores and, when the name is too close to an existing one, CAC's suggested alternatives. Slower and rate limited: use it for a name the user is seriously considering.
Annotations the server declares
- openWorldHint: true
- readOnlyHint: true
- title: Run CAC's name compliance check
generate_business_namesBrainstorm CAC-registrable business names for an idea.Reads text others write1 finding
Why it is in this group
- The name "generate_business_names" says "generate": a word for a change.
- The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Findings
- Warn
  The server marks "generate_business_names" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
  Matched text
  annotations: {"readOnlyHint":true,"openWorldHint":true}; The name "generate_business_names" says "generate": a word for a change.
  What this check looks for
Description, as the server wrote it
Brainstorm CAC-registrable business names for an idea. Each name comes back already checked against CAC's registry, with `availability`: likely_available, similar_names_exist, or unchecked (CAC's search was busy). Present the results as they are; don't re-check them with check_name_availability unless the user asks about a specific name.
Annotations the server declares
- openWorldHint: true
- readOnlyHint: true
- title: Suggest business names
start_nin_requestStart a paid request on fastcac.com for: 'slip' = the person's NIMC NIN slip (PDF and print-ready image), using their NIN; 'phone' = the person's NIN, found with the phone number t…Reads text others writeNo findings
Why it is in this group
- The name "start_nin_request" says "start": a word for a change.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Description, as the server wrote it
Start a paid request on fastcac.com for: 'slip' = the person's NIMC NIN slip (PDF and print-ready image), using their NIN; 'phone' = the person's NIN, found with the phone number they registered with NIMC (on fastcac.com they can add the slip; you can't request it here). Returns a link for the person and a request_handle for you. The person does a live face check and pays on fastcac.com (₦1,000 for the slip; ₦500 for the NIN, ₦1,200 with the slip); the result goes only to them. Starting is free and charges nothing.
Annotations the server declares
- destructiveHint: false
- idempotentHint: false
- openWorldHint: true
- readOnlyHint: false
- title: Start a NIN or NIN slip request

Only reads 5Looks things up and changes nothing.Show 5 read-only tools

check_name_availabilitySearch CAC's public registry for names matching or similar to a name, across every registration type (business names, companies, LLPs, trustees).Reads text others writeNo findings
Why it is in this group
- The description's first verb is "search": a word for reading.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Description, as the server wrote it
Search CAC's public registry for names matching or similar to a name, across every registration type (business names, companies, LLPs, trustees). CAC rejects a new name that's too close to any of them, active or inactive. close_matches share a distinctive word with the name: any close match means the name is at risk. other_matches only share generic words. An empty close_matches usually means it's available, but CAC makes the final call.
Annotations the server declares
- openWorldHint: true
- readOnlyHint: true
- title: Check a name against CAC's register
get_cac_tax_idGet the Tax ID (TIN) CAC's public search shows for a registered business.Reads text others writeNo findings
Why it is in this group
- The name "get_cac_tax_id" says "get": a word for reading.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Description, as the server wrote it
Get the Tax ID (TIN) CAC's public search shows for a registered business. Takes company_id, rc_number and classification_id from a search_cac_register result. Returns { name, rc_number, tax_id }, or an error 'not_found' when CAC has none.
Annotations the server declares
- openWorldHint: true
- readOnlyHint: true
- title: Get a registered business's Tax ID
get_nin_request_statusWhere a request from start_nin_request stands: status (waiting_for_person, started, settling, verified, failed, expired, paid, delivered, delivery_failed), next_step in words, the …Reads text others writeNo findings
Why it is in this group
- The name "get_nin_request_status" says "get": a word for reading.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Description, as the server wrote it
Where a request from start_nin_request stands: status (waiting_for_person, started, settling, verified, failed, expired, paid, delivered, delivery_failed), next_step in words, the products and their naira prices. Never the NIN or the person's details: those go only to the person.
Annotations the server declares
- openWorldHint: true
- readOnlyHint: true
- title: Check a NIN request
search_cac_registerSearch the Corporate Affairs Commission's (CAC) public register for businesses already registered in Nigeria, by name or by RC/BN number.Reads text others writeNo findings
Why it is in this group
- The name "search_cac_register" says "search": a word for reading.
What it can reach
- untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
Description, as the server wrote it
Search the Corporate Affairs Commission's (CAC) public register for businesses already registered in Nigeria, by name or by RC/BN number. Returns `results`: name, rc_number (the BN number for a business name), registration_date, classification, nature_of_business, status (e.g. ACTIVE or INACTIVE), company_id and classification_id. This lists what exists; it isn't an availability check (use check_name_availability or check_business_name_compliance). An `error` never means there's no match.
Annotations the server declares
- openWorldHint: true
- readOnlyHint: true
- title: Search CAC's public register
search_line_of_businessFind exact entries in CAC's line-of-business picklist matching what the business does.No findings
Why it is in this group
- The name "search_line_of_business" says "search": a word for reading.
Description, as the server wrote it
Find exact entries in CAC's line-of-business picklist matching what the business does.
Annotations the server declares
- openWorldHint: false
- readOnlyHint: true
- title: Find a CAC line of business

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Exfil surface

Which tools read private data, which read text someone else can write, and which can send data out. One of each is a path a prompt injection can use.

No private-data, untrusted-input, outbound path in this server alone: no tool is tagged private-data or outbound.

Reads private data0: Reads files, mail, messages, databases, secrets, calendars or repositories.
Reads text others write7: Brings in text someone else can write: web pages, inbound email, messages, issues and comments.; check_business_name_compliance
check_name_availability
generate_business_names
get_cac_tax_id
get_nin_request_status
search_cac_register
start_nin_request
Can send data out0: Can carry data to people or systems: it sends, posts or publishes, or takes a recipient, channel or URL.

Other servers in the same agent add their own tools to these paths. Audit your whole setup to see them together.

Findings

Matches of fixed checks, with the text they matched.

2 warn

Warncheck_business_name_compliance
The server marks "check_business_name_compliance" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
Matched text
annotations: {"readOnlyHint":true,"openWorldHint":true}; The description's first verb is "run": a word for a change.
What this check looks for
Warngenerate_business_names
The server marks "generate_business_names" read-only (readOnlyHint: true), and its own name, description or input give the class "write".
Matched text
annotations: {"readOnlyHint":true,"openWorldHint":true}; The name "generate_business_names" says "generate": a word for a change.
What this check looks for

History

Changes to its tool definitions and to its remote endpoint, newest first.

No change seen yet. Its tools are rescanned every day, and a remote endpoint is looked at once a week.

All changes to this server

Install

Pinned to version 1.0.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http cac https://api.fastcac.com/mcp

claude mcp add --transport http cac https://api.fastcac.com/mcp

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change or a way out, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json

{
  "permissions": {
    "allow": [
      "mcp__cac__check_name_availability",
      "mcp__cac__get_cac_tax_id",
      "mcp__cac__get_nin_request_status",
      "mcp__cac__search_cac_register",
      "mcp__cac__search_line_of_business"
    ],
    "ask": [
      "mcp__cac__calculate_cac_fees",
      "mcp__cac__check_annual_returns",
      "mcp__cac__check_business_name_compliance",
      "mcp__cac__generate_business_names",
      "mcp__cac__start_nin_request"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. A read that can send data out (it takes a URL, say) asks first too. It assumes the server is installed as cac. Review it before you use it.

Capability tags behind 7 rules

mcp__cac__check_business_name_compliance untrusted-input
mcp__cac__check_name_availability untrusted-input
mcp__cac__generate_business_names untrusted-input
mcp__cac__get_cac_tax_id untrusted-input
mcp__cac__get_nin_request_status untrusted-input
mcp__cac__search_cac_register untrusted-input
mcp__cac__start_nin_request untrusted-input

Keep the decision: fail CI when the tools change, follow every change, or show a badge.

Pin in CI

Fail a build when the tools you reviewed are not the tools the server serves today.

curl -s "https://anlyon.dev/api/v1/servers/com.fastcac/cac/verify?hash=465be4ba5ed9c372ba5d73c9ea8f196f7a0f6a3c896fdde5a8e4b1daeff83dad" | jq -e '.changed == false'

Pinned hash 465be4ba5ed9, from Nov 3, 2026, 16:18 UTC.

Watch

Get told when its tools change: a new tool, a new description, a new class.

https://anlyon.dev/servers/com.fastcac/cac/changes.xml

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Badge

[![anlyon.dev](https://anlyon.dev/badge/com.fastcac/cac.svg)](https://anlyon.dev/servers/com.fastcac/cac)

Source: MCP Registry. Synced Nov 3, 2026, 16:17 UTC.