Harmonic MCP connector
Connect Harmonic to Elaichi and Claude, ChatGPT, Cursor and any MCP client can search and enrich companies, people and investors, and manage your lists, with each person signed in as themselves.
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How it connects. Connects over OAuth. The credential goes into a vault nobody reads back.
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One address. https://api.elaichi.ai/mcp, the same for every user.
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Their own access. An agent never gets more than the person it acts for.
How to connect
How to connect Harmonic to Claude, ChatGPT or Cursor
Two steps, about a minute.
In Elaichi
Connect Harmonic once
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Open Connections, choose Add connection, and pick Harmonic.
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Optionally set Share with to give a team access, then press Connect.
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Approve it in Harmonic. Harmonic's own window opens. Whoever approves it decides what this connection can reach.
The credential is vaulted. Nobody reads it back, not even the AI.
Add connection
Choose a connector.
In your AI client
Point it at one endpoint
Everyone in the organization uses the same address, and each person only ever reaches what their own account allows.
Harmonic MCP connector for Claude
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1
Open Customize, then Connectors.
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2
Press Add.
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3
Name it, paste the MCP server URL, then Continue.
https://api.elaichi.ai/mcp -
4
Sign in and approve.
On Team and Enterprise, an Owner adds it once. Everyone else turns it on for themselves.
Harmonic MCP connector for ChatGPT
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1
Open Plugins, then press the + button.
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2
Name it and paste the endpoint into Server URL.
https://api.elaichi.ai/mcp -
3
Leave Authentication on OAuth, then tick the risk acknowledgement.
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4
Press Create, then sign in and approve.
Works on the web today. The plugin directory lives at chatgpt.com/plugins.
Harmonic MCP connector for Cursor
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1
Open
~/.cursor/mcp.json. -
2
Add the endpoint under
mcpServers.https://api.elaichi.ai/mcp -
3
Reload Cursor, then sign in and approve.
~/.cursor/mcp.json
{
"mcpServers": {
"elaichi": {
"url": "https://api.elaichi.ai/mcp"
}
}
}
Set up per machine, so repeat it on each computer you work from.
Connect Harmonic to any MCP client
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1
Add the endpoint as a remote MCP server.
https://api.elaichi.ai/mcp -
2
Sign in and approve.
{
"mcpServers": {
"elaichi": {
"url": "https://api.elaichi.ai/mcp"
}
}
}
The Elaichi Agent already has these tools, with nothing to set up.
Use cases
What teams do with Harmonic through Elaichi
Every one of these runs inside the access the person already has, and lands in the same audit log.
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Sales
Build a target account list before outreach
Ask for companies that match a segment, such as Series A fintech in Berlin, and have them added to a Harmonic list with headcount and funding filled in. The rep starts the week with accounts, not a blank search.
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Investing
Source new companies every morning
Pull the companies that match a thesis and have raised recently, then enrich each one with founders, investors and growth signals from Harmonic. What used to be an hour of tabs becomes one ask.
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Recruiting
Find people who just changed roles
Search Harmonic for engineers or operators who recently left a company on your watchlist and save them to a candidate list. The recruiter reaches out while the move is still fresh.
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Partnerships
Map who already backs a company
Before a partner call, ask which investors sit on a company's cap table and which other portfolio companies overlap with yours. The brief writes itself from Harmonic records.
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Marketing
Size a segment for a campaign
Ask how many companies in Harmonic fit a profile, say healthtech with over fifty employees in the US, and save the set as a list for the campaign. The count and the audience come from the same place.
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Research
Keep custom fields up to date
After a diligence call, ask the agent to record the notes, score and stage in the custom fields on the company's Harmonic record. Nothing lives only in someone's notebook.
Try asking
- “Find seed stage fintech companies in Berlin that raised this quarter”
- “Add the companies from my AI infrastructure search to the Q3 list”
- “Which investors backed the companies on my Series A watchlist?”
Compare
Elaichi vs Zapier MCP vs Composio for Harmonic
All three can connect Harmonic to an AI assistant, and all three have admin controls. They differ in where access lives and how you pay.
| What to check | Elaichi | Zapier MCP | Composio |
|---|---|---|---|
| Where the AI connects |
One address for the whole organization.
https://api.elaichi.ai/mcp
|
A server per member, created at sign-in. | An MCP endpoint per team, or an SDK. |
| Control over Harmonic tools | Allow or restrict single Harmonic tools, per role or user. | App and action restrictions on the account. | Role permissions, down to the action. |
| Record of calls | One audit entry per Harmonic call. | A History tab of tool calls. | A log of every tool call. |
| Single sign-on | SAML or OIDC, plus SCIM, on Gold. | SAML on Enterprise. | SAML and OIDC on Enterprise. |
| Price | $15 per user per month. | 2 tasks per successful call. | Billed per tool call. |
Sources: Zapier MCP docs, security, usage; Composio docs, gateway, enterprise, pricing. Checked September 2026.
Longer take: Zapier MCP alternative and when you don't need an MCP gateway.
See it in Elaichi
What connecting Harmonic gets you
5 screens from the product, each doing one job for your Harmonic account.
The agent
Ask Harmonic about any company in plain language.
Answers come from live Harmonic companies, people and investors, not a stale export.
- companies
- people
- investors
- lists
Ask Elaichi to work across your apps.
Find seed stage fintech companies in Berlin that raised this quarter
Add the companies from my AI infrastructure search to the Q3 list
Which investors backed the companies on my Series A watchlist?
Also runs in Claude, ChatGPT or Cursor
MCP clients
One endpoint puts Harmonic in every MCP client.
Claude, ChatGPT and Cursor share one governed endpoint, with no SDK and no shared API key.
ElaichiMCP clientsClaude
ChatGPT
Cursor
Copy the endpoint
Toolboxes
Each team gets its own Harmonic toolbox.
Sourcing, sales and recruiting each see only the Harmonic toolbox scoped to them.
- Sales
- Investing
- Recruiting
- Partnerships
ElaichiToolboxesShared connections
Teammates use Harmonic without seeing a credential.
One person connects Harmonic, shares it with teams, and nobody else handles a secret.
- Sales EMEA
- Sourcing
- Growth team
- Recruiting
ElaichiConnectionsAudit log
Every Harmonic call answers who did what.
When, who, what happened and which company or list, kept in an append-only log.
- When
- Who
- What happened
- Type
ElaichiAudit logLaunching soon
From answering questions to doing the work
A person no longer has to ask. A trigger starts the work, inside the same permissions and the same audit log as everything else. Automations and live dashboards are launching soon, on the Black plan.
Automations
A schedule starts Harmonic work and finishes it.
New companies are fetched, grouped, drafted into a digest, approved, then posted back to Harmonic.
Harmonic digest
Run 418 · started 2 minutes ago · on behalf of Emily Carter
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✓
Schedule
Every weekday at 8:00 AM
0.2s -
✓
Fetch companies
Harmonic
1.4s -
✓
Group by owner
Transform
0.1s -
✓
Draft the digest
Agent step
Ran with 4 tools, returned a structured summary
6.2s -
Approve the digest
Needs approval
Assigned to Michael Brennan
Approve Deny -
Post the digest
Harmonic
Queued
Collections and dashboards
Harmonic health numbers arrive without anyone asking.
Four metrics, 14 days of companies added and a team breakdown, computed without a model.
Harmonic health
Refreshed 4 minutes ago · every 15 minutes · from the companies collection
Companies
1,284 ↓ 12%
People
96 ↓ 8%
Needs attention
3 ↑ 2
Updated this week
412 ↑ 9%
Companies created
Last 14 days
By team
Share of activity
Sales EMEA 34%
Sourcing 27%
Growth team 21%
Recruiting 18%
FAQ
Frequently asked questions
How do I connect Harmonic to Claude?
In Elaichi, choose Harmonic and sign in on the Harmonic screen that opens, then approve access. There is no OAuth application to register and no client ID or secret to generate. Then in Claude go to Customize, then Connectors, then Add, and paste https://api.elaichi.ai/mcp. Harmonic now appears in Claude, and short concrete asks tend to get better results than long sentences.
Does Harmonic work with ChatGPT and Cursor as well as Claude?
Yes. Once Harmonic is connected in Elaichi, the same endpoint, https://api.elaichi.ai/mcp, works in Claude, ChatGPT, Cursor, any other MCP client and the Elaichi Agent. You connect Harmonic once and every client picks it up.
What can an AI agent actually do with my Harmonic data?
It can search Harmonic for companies, people and investors that match a description, enrich a record with funding, headcount, founders and investors, and add or remove companies from your lists. It can also fill in custom fields on a record. What is available depends on what your Harmonic account has set up.
Does connecting Harmonic give the AI everything in my workspace?
No. Every call runs as the person who signed in, so the agent sees only the Harmonic companies, lists and custom data that person can already see. Elaichi can narrow that access further for a team or a toolbox, and it can never widen it beyond what Harmonic itself allows.
Can I stop an agent from deleting or changing things in Harmonic?
Yes. Restrictions in Elaichi apply per action, so you can allow searching and enriching Harmonic records while blocking changes to lists or custom fields. A restricted action is never advertised to Claude, ChatGPT or Cursor at all, so no prompt can reach it.
What happens to a Harmonic connection when someone leaves?
Offboarding that person in Elaichi ends their access to Harmonic through every client at once. A shared Harmonic connection keeps working for everyone else on the team. If you disconnect Harmonic in Elaichi, it disappears from Claude, ChatGPT, Cursor and every other client in one step.
Does the Harmonic MCP connector work with Gemini, Codex, Claude Code or other MCP clients?
Yes. Harmonic is reached over the same MCP endpoint every client uses, so anything that speaks MCP can call it — Gemini, Codex, Claude Code, Windsurf, Cline, Zed and OpenCode among them — alongside Claude, ChatGPT, Cursor, and the Elaichi Agent. The tools on offer and the access behind them are identical whichever client asks. Only the setup screen differs.
Is Elaichi an alternative to Zapier MCP for Harmonic?
Yes. Both let Claude, ChatGPT or Cursor use Harmonic. Zapier MCP fits a team that already automates in Zapier, since each person signs in and acts as themselves in that account. Elaichi fits when IT wants one address for the whole company, per-tool rules by role, and a record of every Harmonic call.
How is Elaichi different from Composio for Harmonic?
Composio gives AI agents tools and sign-in handling across 1,000+ apps, for developers building agents or people using an assistant, billed per tool call. Elaichi gives a company's own people governed access to Harmonic: one address, restrictions per role or user, and $15 per user per month. Both have role permissions and a log of every call.
Put Harmonic in front of your team
14 days on Gold, no credit card. Connect it once and pick what each team can call.
- Works with
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and any other MCP client, or the Elaichi Agent.
- When the trial ends
- Nothing is deleted. Connections, roles and the audit log stay where they are, so subscribing picks up exactly where you left off.