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Zapier, Make and the API

Connect Thenexi to Zapier, Make or your own code with API keys and webhooks — new leads, bookings and campaign replies, the moment they happen.

In Integrations, admins can get the Chrome extension and create API keys and webhooks.

Chrome extension

On any company website, click the Thenexi icon, then Find people. You get the decision-maker and other people named on the site, with their likely email, plus the site's emails, phones, WhatsApp and social profiles. Then Save as lead, or choose an email campaign and Add to campaign; the address is checked first. Save the company as a lead saves the business itself.

To install: Integrations → Thenexi for Chrome → Download, then unzip it. Open chrome://extensions, turn on Developer mode, click Load unpacked and choose the folder. Then click the Thenexi icon and paste an API key (below). The extension only talks to Thenexi, and only reads the address of the tab you click it on.

Webhooks: Thenexi tells your other tools

Add webhook, paste the address, and tick the events. For Zapier, that address comes from Webhooks by Zapier → Catch Hook. Thenexi then sends a JSON message the moment each event happens:

• Send test sends a sample so you can check the address works. Deliveries shows what was sent.
• If your server is down, Thenexi tries again for about 15 hours.
• A webhook that fails 20 times in a row is switched off. Turn it back on once your server works.
• Signature: each message is signed. The X-Thenexi-Signature header is sha256= plus the HMAC-SHA256 of "<X-Thenexi-Timestamp>.<body>", using the webhook's secret, which is shown once when you add it.

API keys: your tools act in Thenexi

New API key shows the key once; copy it. Send it as Authorization: Bearer nx_… to https://api.thenexi.com/v1/api:

• GET /me: checks the key
• GET /leads?since=2026-11-01T00:00:00Z: newest leads
• POST /leads: adds a lead (name, email, phone, company, value, notes)
• POST /contacts: adds or updates a contact (email, name, phone, company, tags)
• GET /outreach/campaigns and POST /outreach/campaigns/:id/prospects: add people to an email campaign. They go through the email checker first.
• POST /hooks { "target_url", "event" } and DELETE /hooks/:id: Zapier's instant triggers ("REST hooks")

Safety. A key only works for your own business and acts with admin rights, so keep it secret. Adding data through the API needs a paid plan. Each key is limited to:

• 120 requests a minute, wherever it's used from;
• 1,000 new records a day (leads, contacts, campaign people);
• 200 website lookups a day (Find people).

You get an email whenever a key is created, and when a key hits its daily limit. Everything a key adds is marked: leads show the source API. Each key shows what it added. Delete what it added removes all of it in one click; people already emailed and records that existed before aren't touched. When you Delete key, tick Also delete everything it added to clean up at the same time.