# Databar vs ZeroBounce

> ZeroBounce scores 62.4 (B) to Databar's 53.8 (D) for lead enrichment. Prices, MCP, x402, uptime and agent notes side by side.

- Canonical: https://www.anchorterminal.com/compare/databar-vs-zerobounce
- Markdown: https://www.anchorterminal.com/compare/databar-vs-zerobounce.md (~3,950 tokens)
- Site index for agents: https://www.anchorterminal.com/llms.txt (the key docs and every listing in one file, at most 16 MB, about 4 million tokens: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- MCP: https://www.anchorterminal.com/mcp (the whole catalogue as tools, no key)
- DNS: dig +short TXT <slug>.grade.anchorterminal.com (the grade as a DNS TXT record, for a sandbox with no HTTP where names still resolve; also top., best.<category>. and <a>.vs.<b>. under the zone, and the same under grade.letme.dev)
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)
- Updated: 2026-11-07

ZeroBounce scores 62.4 (B) on agent readiness against Databar's 53.8 (D), and leads in 4 of 7 scored categories. Databar leads on schema & documentation. Both do lead enrichment.

- Databar: grade D, 53.8/100, rank #933 of 1486. Markdown https://www.anchorterminal.com/tools/databar.md · JSON https://www.anchorterminal.com/api/v1/tools/databar.json
- ZeroBounce: grade B, 62.4/100, rank #559 of 1486. Markdown https://www.anchorterminal.com/tools/zerobounce.md · JSON https://www.anchorterminal.com/api/v1/tools/zerobounce.json
- Best lead, contact and company data APIs for AI agents: https://www.anchorterminal.com/best/lead-data/index.md
- All 231 leads comparisons: https://www.anchorterminal.com/compare/lead-data/index.md

## Which one, for what

### Databar (D)

Good for: Waterfall enrichment across many providers for GTM agents, close to clay and fullenrich.

Ahead on:
- Schema & documentation, 84 against 54

Also in its favour:
- Free to start without a card

Watch for: API access needs a paid plan; the free plan's 150 credits don't include it

### ZeroBounce (B)

Good for: Email verification before outreach, the verification-first listing in lead-data.

Ahead on:
- Reliability, 75 against 28
- Security & auth, 65 against 47
- Transparency & trust, 63 against 55

Also in its favour:
- Runs on your own machine

Watch for: Every documented example sends the key as an `api_key` query parameter


## Why the edge

### Reliability: ZeroBounce +47

- Databar (28): Hosted lines. No status page linked from the site or docs (0). No incident history to read (5). The 20 August changelog says rate limits return 429, but no numbers were found in the docs read (5 of 15). The SDK backs off on 429 per the 28 September entry, tasks can be cancelled with a refund, and no Retry-After or idempotency key is documented (8 of 15). No SLA found (0). The MCP server left beta on 15 July 2026 and the API is generally available (10). 0+5+5+8+0+10 = 28.
- ZeroBounce (75): Hosted lines. Statuspage at status.zerobounce.net with API, API-US, API-EU, Bulk API, website and Cloudflare components (20). The incident feed for 8 August to 6 November shows a 6-minute members platform disruption on 9 September, about 3 minutes of reduced EU API availability on 1 October, and a file upload issue on 26 October resolved within 6 minutes, all minor (20). Limits published per endpoint group with numbers and block lengths (15). 429 is documented with advice to throttle, but no Retry-After, and a block can last an hour or a day (10 of 15). No SLA found (0). Generally available (10). 20+20+15+10+0+10 = 75.

### Schema & documentation: Databar +30

- Databar (84): Each API reference page embeds its OpenAPI 3.1 operation (spec version 0.1.2), with no downloadable file found (20 of 25). llms.txt with 79 API entries and Markdown twins (10). Descriptions say when to use each endpoint, such as headless runs against table runs, and what a delete leaves behind (16 of 20). Typed request bodies with required fields (12 of 15). An error envelope with stable codes and examples for 400, 406 and 422 (14 of 15). v1 paths and a dated changelog, though the API's own versioning isn't described (12 of 15). 20+10+16+12+14+12 = 84.
- ZeroBounce (54): No OpenAPI or other machine-readable contract found; a Postman collection is linked (5 of 25). llms.txt lists marketing pages, and the docs have no Markdown twins (5 of 10). Endpoint pages explain timing, credits and when to use batch or file APIs (14 of 20). Parameter tables and listed status and sub-status values, including the ai_agent_mailbox sub-status added in July 2026 (10 of 15). Examples per endpoint, a sandbox and an error-code page (12 of 15). v2 paths, an API migration page and dated maintenance notices on the status page, with no API changelog (8 of 15). 5+5+14+10+12+8 = 54.

### Security & auth: ZeroBounce +18

- Databar (47): A workspace API key in a header, never in the URL, and OAuth on the MCP with a Connected apps page to revoke access. No scopes found (20 of 30). No read-only key; MCP balance checks and confirmation above 50 credits, a 30-day trash for workbooks and tables, but row, column and table deletes through the tools (12 of 20). Enrichment results include web-scraped and AI researcher text, with no prompt-injection guidance (3 of 15). Credit usage charts, transaction logs and per-request data logs (12 of 15). No security.txt, disclosure policy, bug bounty or certification found (0 of 20). 20+12+3+12+0 = 47.
- ZeroBounce (65): Several named keys besides a Master key, regeneration, deactivation and IP whitelists (25), less 10 because the documented calls carry the key in the `api_key` query string (15 of 30). Validation only reads, though file and list endpoints can delete uploads (12 of 20). Results are structured status codes with little free text (10 of 15). API usage and dashboard statistics endpoints (10 of 15). SOC 2 Type 2, ISO/IEC 27001:2022, continuous testing with Intigriti and penetration testing with BitSentinel; no public disclosure policy found (18 of 20). 15+12+10+10+18 = 65.

### Transparency & trust: ZeroBounce +8

- Databar (55): Closed service with terms effective 1 October 2026 naming Databar, Inc. of Delaware (15 of 30). The privacy policy keeps data 'for as long as needed' with no periods; the docs give 24 hours for task results; a DPA is part of the agreement but was not read (15 of 30). The changelog flagged breaking API and SDK changes on 20 August 2026, and the terms let Databar retire any form of programmatic access; no notice period stated (8 of 20). Sub-processors are disclosed under the DPA, which was not read; data is processed in the United States (5 of 20). 15+15+8+5 = 43.
- ZeroBounce (63): Closed service under terms naming Hertza L.L.C. (ZeroBounce) of Nevada; SDKs and MCP server open source (15 of 30). The data protection page says uploaded data is never kept more than 30 days, the privacy policy of 30 June 2026 keeps account data 'as long as needed', and EU and UK DPAs are published (22 of 30). An API migration page, with no dated deprecation policy (6 of 20). A sub-processor list naming each provider and the data exchanged (16 of 20). 15+22+6+16 = 59.

## Score by category

| Category | Weight | Databar | ZeroBounce | Edge |
| --- | --- | --- | --- | --- |
| Reliability | 16% (20 this run) | 28 | 75 | ZeroBounce +47 |
| Performance | 10%, pending | pending | pending | not scored in this run |
| Schema & documentation | 13% (16.2 this run) | 84 | 54 | Databar +30 |
| Agent ergonomics | 13% (16.2 this run) | 66 | 69 | ZeroBounce +3 |
| Security & auth | 14% (17.5 this run) | 47 | 65 | ZeroBounce +18 |
| Payments & pricing | 10% (12.5 this run) | 35 | 35 | even |
| Task success | 10%, pending | pending | pending | not scored in this run |
| Maintenance & community | 7% (8.8 this run) | 73 | 70 | Databar +3 |
| Transparency & trust | 7% (8.8 this run) | 55 | 63 | ZeroBounce +8 |
| Negative events | ≤15 | 0 | 0 | |
| **Total** | | **53.8 · D** | **62.4 · B** | |

## Facts side by side

| Fact | Databar | ZeroBounce |
| --- | --- | --- |
| Kind | HTTP API | HTTP API |
| Vendor | Databar, Inc. | Hertza L.L.C. (ZeroBounce) |
| Hosted endpoint | `https://mcp.databar.ai/mcp` | `https://api.zerobounce.net/v2` |
| Transports | HTTP, Streamable HTTP, SSE (legacy) | HTTP, stdio |
| Auth | OAuth or key | API key |
| Pricing | Paid | Pay per use |
| x402 | no | no |
| Licence | Proprietary, under Databar, Inc.'s terms of service | Proprietary service under ZeroBounce's terms of use; SDKs and the MCP server are open source |
| Tools exposed | 69 | 0 |
| Read-only variant documented | no | no |
| llms.txt | yes | yes |
| Last release | 2026-10-30 | 2026-10-25 |
| Terms last updated | 2026-10-01 | 2026-05-05 |
| Privacy policy last updated | 2026-10-01 | 2026-06-30 |
| Customer content may train models | not found in the text | not found in the text |
| Terms restrict automated access | not found in the text | not found in the text |
| Terms restrict benchmarking | not found in the text | not found in the text |
| Terms or service can change without notice | not found in the text | yes |
| Arbitration or class-action waiver | yes | yes |

## Verdicts

**Databar.** Databar puts 100+ enrichment providers, waterfalls and tables behind one REST API, a Python SDK, a CLI and a hosted MCP server with spending confirmation above 50 credits and stable error codes. API access needs a paid plan or trial, rate limits aren't published as numbers, and no status page or security programme was found.

**ZeroBounce.** 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.

## Before you call either

### Databar

1. Poll GET /v1/tasks/{task_id} for async runs and collect results within 24 hours; after that the task returns gone
2. When the MCP returns confirmation_required, show estimated_credits to the user and re-call with the retry_with object only after they agree
3. Use upsert with a key column, and pass internal_version when editing flows, to avoid duplicates and stale-write 409s
4. Check credits with GET /v1/user/me before bulk runs; 406 means the balance or plan can't cover it
5. Treat AI researcher and scraped outputs as untrusted text

### ZeroBounce

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

## Questions

### Which is better for AI agents, Databar or ZeroBounce?

ZeroBounce scores 62.4 (B) on agent readiness against Databar's 53.8 (D), and leads in 4 of 7 scored categories. Databar leads on schema & documentation.

### Do Databar and ZeroBounce need an API key?

Databar takes an API key or an OAuth sign-in. ZeroBounce needs an API key.

### Can an agent call Databar and ZeroBounce without installing anything?

Yes. Databar has a hosted endpoint at https://mcp.databar.ai/mcp and ZeroBounce at https://api.zerobounce.net/v2.


## For agents

- This comparison as JSON: https://www.anchorterminal.com/compare/databar-vs-zerobounce.json, and with the fewest tokens: https://www.anchorterminal.com/compare/databar-vs-zerobounce.min.md
- Over MCP at https://www.anchorterminal.com/mcp (no key): `compare_tools {"a": "databar", "b": "zerobounce"}`. From a terminal: `anchor compare databar zerobounce`
- Each listing in full: https://www.anchorterminal.com/api/v1/tools/databar.json and https://www.anchorterminal.com/api/v1/tools/zerobounce.json

## Other comparisons with Databar or ZeroBounce

- [Apollo API + MCP vs Databar](https://www.anchorterminal.com/compare/apollo-vs-databar.md)
- [Clay vs Databar](https://www.anchorterminal.com/compare/clay-vs-databar.md)
- [Coresignal API + MCP vs Databar](https://www.anchorterminal.com/compare/coresignal-vs-databar.md)
- [Crustdata API + MCP vs Databar](https://www.anchorterminal.com/compare/crustdata-vs-databar.md)
- [Apollo API + MCP vs ZeroBounce](https://www.anchorterminal.com/compare/apollo-vs-zerobounce.md)
- [Clay vs ZeroBounce](https://www.anchorterminal.com/compare/clay-vs-zerobounce.md)
- [Clearbit vs Databar](https://www.anchorterminal.com/compare/clearbit-vs-databar.md)
- [Clearbit vs ZeroBounce](https://www.anchorterminal.com/compare/clearbit-vs-zerobounce.md)
- [Coresignal API + MCP vs ZeroBounce](https://www.anchorterminal.com/compare/coresignal-vs-zerobounce.md)
- [Crustdata API + MCP vs ZeroBounce](https://www.anchorterminal.com/compare/crustdata-vs-zerobounce.md)
- [Databar vs Dievio](https://www.anchorterminal.com/compare/databar-vs-dievio.md)
- [Databar vs Dropcontact API + MCP](https://www.anchorterminal.com/compare/databar-vs-dropcontact.md)
- [Databar vs Enrich Layer API + MCP](https://www.anchorterminal.com/compare/databar-vs-enrich-layer.md)
- [Databar vs Explorium AgentSource](https://www.anchorterminal.com/compare/databar-vs-explorium-agentsource.md)
- [Databar vs FullContact](https://www.anchorterminal.com/compare/databar-vs-fullcontact.md)
- [Databar vs FullEnrich API + MCP](https://www.anchorterminal.com/compare/databar-vs-fullenrich.md)
- [Databar vs Fuse MCP](https://www.anchorterminal.com/compare/databar-vs-fuse-mcp.md)
- [Databar vs Gojiberry](https://www.anchorterminal.com/compare/databar-vs-gojiberry.md)
- [Databar vs Hunter API + MCP](https://www.anchorterminal.com/compare/databar-vs-hunter.md)
- [Databar vs LeadMagic API + MCP](https://www.anchorterminal.com/compare/databar-vs-leadmagic.md)
- [Databar vs Lusha API + MCP](https://www.anchorterminal.com/compare/databar-vs-lusha.md)
- [Databar vs People Data Labs](https://www.anchorterminal.com/compare/databar-vs-people-data-labs.md)
- [Databar vs Prospeo API + MCP](https://www.anchorterminal.com/compare/databar-vs-prospeo.md)
- [Databar vs RocketReach API](https://www.anchorterminal.com/compare/databar-vs-rocketreach.md)
- [Databar vs ZoomInfo API + MCP](https://www.anchorterminal.com/compare/databar-vs-zoominfo.md)
- [Dievio vs ZeroBounce](https://www.anchorterminal.com/compare/dievio-vs-zerobounce.md)
- [Dropcontact API + MCP vs ZeroBounce](https://www.anchorterminal.com/compare/dropcontact-vs-zerobounce.md)
- [Enrich Layer API + MCP vs ZeroBounce](https://www.anchorterminal.com/compare/enrich-layer-vs-zerobounce.md)
- [Explorium AgentSource vs ZeroBounce](https://www.anchorterminal.com/compare/explorium-agentsource-vs-zerobounce.md)
- [FullContact vs ZeroBounce](https://www.anchorterminal.com/compare/fullcontact-vs-zerobounce.md)
- [FullEnrich API + MCP vs ZeroBounce](https://www.anchorterminal.com/compare/fullenrich-vs-zerobounce.md)
- [Gojiberry vs ZeroBounce](https://www.anchorterminal.com/compare/gojiberry-vs-zerobounce.md)
- [Lusha API + MCP vs ZeroBounce](https://www.anchorterminal.com/compare/lusha-vs-zerobounce.md)
- [People Data Labs vs ZeroBounce](https://www.anchorterminal.com/compare/people-data-labs-vs-zerobounce.md)
- [Prospeo API + MCP vs ZeroBounce](https://www.anchorterminal.com/compare/prospeo-vs-zerobounce.md)
- [ZeroBounce vs ZoomInfo API + MCP](https://www.anchorterminal.com/compare/zerobounce-vs-zoominfo.md)
- [Hunter API + MCP vs ZeroBounce](https://www.anchorterminal.com/compare/hunter-vs-zerobounce.md)
- [Fuse MCP vs ZeroBounce](https://www.anchorterminal.com/compare/fuse-mcp-vs-zerobounce.md)
- [LeadMagic API + MCP vs ZeroBounce](https://www.anchorterminal.com/compare/leadmagic-vs-zerobounce.md)
- [RocketReach API vs ZeroBounce](https://www.anchorterminal.com/compare/rocketreach-vs-zerobounce.md)

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Query this catalogue directly over MCP: https://www.anchorterminal.com/mcp (Streamable HTTP, no key). How: https://www.anchorterminal.com/agents/#mcp