# ZeroBounce (slim)

> ZeroBounce is an email verification API from Hertza L.L.C. that checks single addresses and lists for deliverability, with status and sub-status codes, plus AI scoring, email finder, domain search and activity data, and an open-source MCP server.

- Full: https://www.anchorterminal.com/tools/zerobounce.md (~6,450 tokens) · this version ~1,480 tokens · JSON https://www.anchorterminal.com/tools/zerobounce.json · canonical https://www.anchorterminal.com/tools/zerobounce
- Index: https://www.anchorterminal.com/llms.txt · API: https://www.anchorterminal.com/api/v1/index.json · MCP: https://www.anchorterminal.com/mcp · Updated: 2026-11-07 · pricing https://www.anchorterminal.com/tools/zerobounce#pricing · reviews https://www.anchorterminal.com/tools/zerobounce#reviews
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)

**B · 62.4/100 · rank #559 of 1486 · #4 in Lead & company data · not agent-ready · confidence medium**


Assessment: ZeroBounce's v2 API verifies emails with detailed status and sub-status codes, publishes per-endpoint limits, a Statuspage with short incidents only in the last 90 days, SOC 2 Type 2 and ISO 27001, and $0.0195 per email at the smallest pack. The documented key travels in the query string, and there is no OpenAPI contract.

## Facts

- Kind: HTTP API · vendor: Hertza L.L.C. (ZeroBounce) · category: Lead & company data · legal entity: Hertza L.L.C. · provenance 67/100
- Endpoint: `https://api.zerobounce.net/v2` (HTTP, stdio)
- Auth: API key · pricing: Pay per use · x402: no · licence: Proprietary service under ZeroBounce's terms of use; SDKs and the MCP server are open source
- Benchmark probes: not run yet, so Performance is pending
- Live, from our pollers (not part of the score): up at 2026-11-07 18:21 UTC · uptime 30 days 100.0% (200 probes) · p50 69 ms · p95 170 ms over 24 hours
- Vendor status page: no problems reported, All Systems Operational (2026-11-07 18:22 UTC)
- Surface listed: The v2 REST API at api.zerobounce.net (with api-us and api-eu hosts), read from www.zerobounce.net/docs, the pricing, terms, privacy, security, about and MCP pages, and status.zerobounce.net on 6 November 2026. No account was made and no call was sent
- APIs: Single and batch validation, bulk file API, AI scoring, Email Finder, Domain Search, Activity Data, List Evaluator, Inbox Placement Tester and Warmup APIs
- Rate limits: 80,000 validations per 10 seconds; 80,000 an hour on other endpoint groups and 800 an hour on some, higher on ZeroBounce ONE. Overruns block the key from one minute to one day
- Certifications: SOC 2 Type 2 (22 March 2022), ISO/IEC 27001:2022 (28 July 2025), Data Privacy Framework participant; Intigriti and BitSentinel testing
- Legal entity: Hertza L.L.C., doing business as ZeroBounce, a Nevada LLC based at 10 E. Yanonali St., Santa Barbara, California, per the terms of use
- Prices: Email validation, smallest pay-as-you-go pack $0.0195 per call; ZeroBounce ONE $99 per month (plan)

- Scores: Reliability 75, Performance pending, Schema & documentation 54, Agent ergonomics 69, Security & auth 65, Payments & pricing 35, Task success pending, Maintenance & community 70, Transparency & trust 63 · total over the 7 assessed categories
- Why: Reliability, Hosted lines. · Schema & documentation, No OpenAPI or other machine-readable contract found; a Postman collection is linked (5 of 25). · Agent ergonomics, A compact JSON result per address, batch validation and a file API for lists (18 of 25). · Security & auth, Several named keys besides a Master key, regeneration, deactivation and IP whitelists (25), less 10 because the documented calls carry the k… · Payments & pricing, No x402, MPP or L402 (0). · Maintenance & community, Closed service. · Transparency & trust, Closed service under terms naming Hertza L.L.C. (ZeroBounce) of Nevada; SDKs and MCP server open source (15 of 30).
- Sources: 16, open questions: 4, both in the full twin
- Capabilities: email.verification, email.finder, lead.enrichment
- JSON: https://www.anchorterminal.com/api/v1/tools/zerobounce.json
- Verify (for the vendor): the badge `https://www.anchorterminal.com/badges/zerobounce.svg` or a link to https://www.anchorterminal.com/tools/zerobounce from a page on zerobounce.net or one of its subdomains, then `POST https://www.anchorterminal.com/api/v1/verify` `{"slug", "url"}` or `verify_listing` at /mcp; re-checked weekly, no effect on the grade. Snippets in the full twin.
- Support: support@zerobounce.net; https://www.zerobounce.net/docs/; https://www.zerobounce.net/contact-us; https://status.zerobounce.net; more in the full twin

## Before you call it

1. Use the regional host (api-us or api-eu) that matches the data, and test with the sandbox addresses, which spend no credits
2. Set `timeout` (3 to 60 seconds); slow mail servers return unknown, which is free to retry later
3. Stay under 80,000 validations per 10 seconds and avoid repeated bad requests, which block the key for an hour
4. Use the bulk file API for large lists instead of looping on /v2/validate
5. Keep the key out of logs; the API takes it only as `api_key` in the URL

## Connect

```bash
curl "https://api.zerobounce.net/v2/validate?api_key=$ZEROBOUNCE_API_KEY&email=valid@example.com"
```
Full config and headless snippets are in the full page. Through letme (picks today, calling later): https://letme.dev/zerobounce

## Similar tools

| Tool | Grade | Score | Shared capabilities | Slim |
| --- | --- | --- | --- | --- |
| LeadMagic API + MCP | B | 63.3 | lead.enrichment, email.verification, email.finder | https://www.anchorterminal.com/tools/leadmagic.min.md |
| Dropcontact API + MCP | C | 59.1 | lead.enrichment, email.finder, email.verification | https://www.anchorterminal.com/tools/dropcontact.min.md |
| Hunter API + MCP | C | 58.4 | email.finder, email.verification, lead.enrichment | https://www.anchorterminal.com/tools/hunter.min.md |
| Databar | D | 53.8 | lead.enrichment, email.finder, email.verification | https://www.anchorterminal.com/tools/databar.min.md |
| Manifold | D | 53.2 | lead.enrichment, email.finder, email.verification | https://www.anchorterminal.com/tools/manifold-mcp.min.md |


## Panel reviews (0, desk reviews from public material, no calls made)