"Simple HTTP server or client implementation" matching MCP servers:

A Model Context Protocol (MCP) server that provides tools for interacting with simple's data, including customer reports, calendar events, and company information.

Central source of truth for all client data. Syncs every connected platform on a schedule, normalizes it into one client workspace, and serves it to MTOS and AI agents over MCP.

Enables client success teams to get instant, natural-language health reads on client accounts with tools for overall health, low-performing courses, and launcher-only clients.

Integrates Attio CRM with AI clients to manage companies, people, and notes through 14 specialized tools. It supports dynamic schema discovery, enabling users to search, create, and update records within their Attio workspace.

Generates personalized client strategy briefs from a name, and manages client profiles for behavioral intelligence, enabling client-facing professionals to prepare for conversations.

Bridges AI assistants to HubSpot CRM via OAuth2.1+PKCE, enabling tool access through OpenClaw or stdio MCP.

Exposes a Model Context Protocol interface to a growth and revenue API, enabling MCP clients to manage account data and interact with platform tools through natural-language-driven tool calls.

Enables AI agents to safely operate HubSpot CRM contacts, deals, and pipelines via MCP, with caching, idempotency, audit trails, and robust error handling.

Enables AI assistants to enrich contacts and build audiences via the YourICP API. Provides tools to set an API token, submit contact lookups by email or LinkedIn URL, and poll for enrichment results.

Revenue intelligence MCP server: RFM analysis, 14.5-point ICP scoring, pipeline health scoring. Embeds Artefact Formula methodology. HubSpot integration.

Enables AI agents to verify email addresses, clean lists, run bulk verification jobs, and manage a Verifly account through natural language, without writing HTTP calls.

Enables interaction with HubSpot CRM through MCP, providing tools to manage contacts, companies, deals, and search/associations via natural language.

An MCP server implementation that integrates Claude with Salesforce, enabling natural language interactions with Salesforce data and metadata for querying, modifying, and managing objects and records.

LeadFuze MCP Server for contact/company enrichment from email or LinkedIn URL plus email validation. Hosted MCP endpoint: https://mcp.leadfuze.com/mcp (API key required).

Enables AI agents to query customer churn risk, MRR at risk, and customer health profiles from Retain, and take actions like adding notes and marking alerts contacted.

A server for interacting with the Iaptic API, allowing AI models like Claude to query customer, purchase, and transaction data, as well as retrieve statistical insights.

An MCP server implementation that integrates Claude with Salesforce, enabling natural language interactions with Salesforce data and metadata.

MCP server for Kadam ad network that enables AI agents to manage campaigns, creatives, audiences, sites, and analytics.

Provides 25 tools to enrich company, person, contact, school, and job data via the Enrich Layer API, enabling lookups, profiles, and contact discovery.

MCP server for Clay.com API providing people and company enrichment, and Clay table operations.