# Harmonic — AI Connector Harmonic publishes 23 MCP tools to Claude and is listed in the ChatGPT apps directory. Marketplace availability, tool surface, verification tier, and what Node8 measured against the live endpoint. Source: https://node8.ai/ai-connectors/productivity/harmonic/ --- [AI Connectors](https://node8.ai/ai-connectors/) · [Productivity](https://node8.ai/ai-connectors/productivity/) # Harmonic Startup and investor research over Harmonic's private dataset Listed in ChatGPT and Claude · 23 published tools · Verified partner [ChatGPT listing](https://chatgpt.com/plugins/harmonic?open_in_app) [Claude connector docs](https://support.harmonic.ai/en/articles/12785899-harmonic-mcp-server-getting-started-guide) [harmonic.ai](https://harmonic.ai) Overview ## What Harmonic does Harmonic is a private-company dataset covering startups, the companies around them, and investors. This connector opens that data to natural-language queries, so a search can be stated as criteria in a sentence instead of assembled from filter controls. Company profiles return funding history, location, founder details, and network connections. Lists of companies and people can be created and maintained from the conversation, and an existing account's saved searches and team network mapping are reachable too. The record describes the app as a research layer over Harmonic's own data rather than a general web search. Saved searches and network mapping refer to a team's existing material in Harmonic. ### Who it is for An investor, analyst, or business development team that researches private companies and the people running them. ### What stands out Queries run against Harmonic's own company and people data, and list building plus saved searches carry over from the account rather than living only in the chat. Availability ## Where Harmonic is listed Harmonic ships this on both marketplaces: Harmonic is listed in the Claude connectors directory and in the ChatGPT apps directory, under the same publisher domain. Only 392 of the 3,150 products in this directory are listed in both marketplaces. One MCP server can serve both surfaces; what differs is each platform's listing and review process. ChatGPT listing ## In the ChatGPT apps directory Developer Harmonic AI, Inc Filed under Finance Listed since June 2026 Authentication Authenticates when installed Website [harmonic.ai](https://harmonic.ai) Policies published Privacy policy · Terms of service Official listing [Open in ChatGPT](https://chatgpt.com/plugins/harmonic?open_in_app) Snapshot August 2026 Claude listing ## In the Claude connectors directory Harmonic publishes 23 tools to Claude, deeper than 74% of the 1,253 Claude-listed connectors. The median Claude-listed connector filed under Productivity publishes 12, so this one runs 11 tools above its bucket's median and ranks 128th of 462 by tool count. It falls in the 21-50 tools band, which holds 20% of the Claude directory. Harmonic publishes a remote MCP endpoint. Claude connects to it over HTTP; there is nothing to install locally. Every connector in the Claude directory is remote, all 1,253 of them, so transport is not a differentiator there. Publisher Harmonic Verification Verified partner (37.8% of the Claude directory) Filed under Productivity Endpoint `https://mcp.api.harmonic.ai` Documentation [Publisher setup docs](https://support.harmonic.ai/en/articles/12785899-harmonic-mcp-server-getting-started-guide) Published tools 23 · 21-50 tools band Depth rank in Productivity 128 of 462 Snapshot August 2026 Harmonic carries partner verification in the Claude directory, which 474 of 1,253 listings do (37.8%). That is a review step past self-publishing, not an Anthropic-built server. In the publisher's words ## How Harmonic describes it > Search, enrich, and research startups and companies using Harmonic's proprietary data on millions of companies and the people behind them. Get detailed company profiles with funding, location, founders, and network connections. Use natural language to find companies matching specific criteria. Create and manage lists of companies and people. Access your team's network mapping and saved searches. Discover startups earlier, research them faster, and act with confidence—an AI-powered research agent built into your workflow. Quoted from the connector's own Claude directory listing as captured in August 2026. Node8 did not write it and does not vouch for it. Nearby ## Other Productivity connectors ### [Lusha](https://node8.ai/ai-connectors/productivity/lusha/) B2B contact data and buying signals lookup Claude · ChatGPT ### [AWS Marketplace](https://node8.ai/ai-connectors/productivity/aws-marketplace/) Discover, compare and research solutions on AWS Marketplace Claude ### [Clean Harbors Careers](https://node8.ai/ai-connectors/productivity/clean-harbors-careers/) Search open roles at Clean Harbors ChatGPT ### [CourtListener](https://node8.ai/ai-connectors/productivity/courtlistener/) U.S. case law, PACER dockets and citation data from CourtListener Claude ### [Cox Careers](https://node8.ai/ai-connectors/productivity/cox-careers/) Search open roles at Cox ChatGPT ### [Dalea - Research Orchestration Platform](https://node8.ai/ai-connectors/productivity/dalea-research-orchestration-platform/) BioPharma R&D workspace: lab documents, data environments and inventory Claude [All 760 Productivity connectors](https://node8.ai/ai-connectors/productivity/) This is an independent catalogue entry compiled by Node8 from Harmonic's public marketplace listings as they stood in August 2026. Listing facts come from the marketplaces; the comparisons against the rest of the directory and any live-endpoint measurements are Node8's. Node8 is not affiliated with Harmonic, and inclusion here is not an endorsement. ## Want your company reachable inside ChatGPT and Claude? Node8 builds MCP servers end to end: deciding which tools are worth exposing, the authentication and permission model, the review submissions, and the onboarding that gets them used. One server serves ChatGPT, Claude, and Microsoft Copilot. [See how it works](https://node8.ai/mcp) Book a strategy session