generated: '2026-08-12'
method: searched
status: published
source: https://www.npmjs.com/package/@rb2b/rb2b-apis-mcp
description: RB2B publishes a first-party local (stdio) MCP server, @rb2b/rb2b-apis-mcp, that exposes
  the RB2B Identity / Enrichment API Partner Program surface (https://api.rb2b.com/api/v1) as 19 MCP tools
  for Claude Desktop, Claude Code and other MCP clients. There is no hosted/remote MCP endpoint — mcp.rb2b.com
  does not resolve. The tool list below is EXTRACTED VERBATIM from the published package's own ListToolsRequestSchema
  handler (dist/server.js) in version 1.1.7; the machine-readable form, with each tool's real inputSchema,
  is saved alongside as mcp/rb2b-mcp-tools.json. The package README is saved as mcp/rb2b-mcp-readme.md.
ownership:
  first_party: true
  evidence: Published under the @rb2b npm scope with package author "RB2B", MIT licensed, and points users
    at RB2B's own API console at https://ui.api.rb2b.com for accounts and keys. The git repository named
    in package.json (github.com/robbclarke/RB2B-APIs-MCP) is not publicly readable (HTTP 404 on the GitHub
    API); the same GitHub account publishes robbclarke/RB2B-WordPress-Plugin, described as "RB2B's WordPress
    plugin". Treated as first-party on the npm scope + author + console evidence, with the repository
    caveat recorded here rather than hidden.
server:
  name: rb2b
  transport: stdio
  hosted: false
  remote_url: null
  package: '@rb2b/rb2b-apis-mcp'
  version: 1.1.7
  published: '2026-04-13'
  install: npx -y @rb2b/rb2b-apis-mcp
  setup: npx -y @rb2b/rb2b-apis-mcp init
  register_claude_code: claude mcp add rb2b -- npx -y @rb2b/rb2b-apis-mcp
  auth: api-key
  auth_detail: The server holds an RB2B API key, stored at ~/.rb2b/config.json with mode 0600, and sends
    it upstream as the Api-Key request header. There is no OAuth flow; /.well-known/oauth-authorization-server
    and /.well-known/oauth-protected-resource both 404 on api.rb2b.com.
  backing_api: https://api.rb2b.com/api/v1
  runtime: Node.js 18+
  sdk: '@modelcontextprotocol/sdk ^1.0.0'
runtime_semantics:
  rate_limit: 50 requests/second per endpoint (surfaced by the server as an error on HTTP 429)
  metering: Every paid tool deducts credits from the account balance. The server checks the balance before
    each paid call and refuses when credits are insufficient.
  credit_warnings: Warnings are appended to responses at balances of 500, 200, 100, 50 and 10 credits
    — [NOTICE] 500-51, [WARNING] 50-11, [CRITICAL] 10 and below.
  error_mapping:
    401: Invalid API key — re-run `npx @rb2b/rb2b-apis-mcp init`
    404: No record found for the provided input
    429: Rate limit exceeded (50 requests/second per endpoint)
tools:
- name: set_api_key
  group: account
  credits: 0
  inputs:
  - api_key
  description: Update the RB2B API key. Validated before saving; takes effect immediately.
- name: help
  group: account
  credits: 0
  inputs: []
  description: List all available RB2B MCP tools with descriptions, required inputs, and credit costs.
- name: check_credits
  group: account
  credits: 0
  inputs: []
  description: Check the remaining API credits for the current RB2B account.
- name: ip_to_company
  group: ip-lookup
  credits: 1
  inputs:
  - ip_address
  description: Identify the company associated with a given IP address.
- name: ip_to_hem
  group: ip-lookup
  credits: 1
  inputs:
  - ip_address
  description: Retrieve hashed emails (MD5 and SHA256) associated with an IP address, ranked with confidence
    scores.
- name: ip_to_maid
  group: ip-lookup
  credits: 1
  inputs:
  - ip_address
  description: Retrieve Mobile Advertising IDs (AAID / IDFA) associated with an IP address.
- name: email_to_linkedin_slug
  group: email-to-identity
  credits: 1
  inputs:
  - email
  description: Look up the LinkedIn profile slug for a plain-text email address.
- name: email_to_best_linkedin
  group: email-to-identity
  credits: 1
  inputs:
  - email
  description: Find the highest-confidence LinkedIn profile URL for a plain-text email address.
- name: email_to_business_profile
  group: email-to-identity
  credits: 2
  inputs:
  - email
  description: Retrieve the business/employer profile (title, company, industry) for a plain-text email
    address.
- name: email_to_maid
  group: email-to-identity
  credits: 1
  inputs:
  - email
  description: Retrieve the Mobile Advertising ID linked to a plain-text email address.
- name: hem_to_linkedin_slug
  group: hem-to-identity
  credits: 1
  inputs:
  - md5
  description: Look up the LinkedIn profile slug for a hashed email (MD5).
- name: hem_to_best_linkedin
  group: hem-to-identity
  credits: 1
  inputs:
  - md5
  description: Find the highest-confidence LinkedIn profile URL for a hashed email (MD5).
- name: hem_to_business_profile
  group: hem-to-identity
  credits: 2
  inputs:
  - md5
  description: Retrieve the business/employer profile for a hashed email (MD5).
- name: hem_to_maid
  group: hem-to-identity
  credits: 1
  inputs:
  - md5
  description: Retrieve the Mobile Advertising ID linked to a hashed email (MD5).
- name: linkedin_to_hashed_emails
  group: linkedin-to-identity
  credits: 1
  inputs:
  - linkedin_slug
  description: Retrieve all hashed emails for a LinkedIn profile slug — personal and business, MD5 and
    SHA256 arrays.
- name: linkedin_to_best_personal_email
  group: linkedin-to-identity
  credits: 1
  inputs:
  - linkedin_slug
  description: Get the highest-confidence personal email for a LinkedIn profile slug.
- name: linkedin_to_personal_email
  group: linkedin-to-identity
  credits: 1
  inputs:
  - linkedin_slug
  description: Get all personal email candidates for a LinkedIn profile slug.
- name: linkedin_to_mobile_phone
  group: linkedin-to-identity
  credits: 3
  inputs:
  - linkedin_slug
  description: Get the mobile phone number for a LinkedIn profile slug.
- name: linkedin_to_business_profile
  group: linkedin-to-identity
  credits: 4
  inputs:
  - linkedin_slug
  description: Retrieve the business/employer profile (title, company, industry) for a LinkedIn profile
    slug.
tool_count: 19
artifacts:
  tools_json: mcp/rb2b-mcp-tools.json
  readme: mcp/rb2b-mcp-readme.md
  crosswalk: mcp/rb2b-tool-crosswalk.yml
deployment:
  mode: none
  endpoint: https://api.rb2b.com/api/v1
  verified: probed
  probe: dead
  note: the endpoint this manifest claimed did not answer; recorded as none rather than deleted so the
    claim stays auditable
  checked: '2026-08-12'
  source: catalog MCP census