Head to head · Lead enrichment · October 2026 research run

Databar vs 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. Both do lead enrichment.

Best lead, contact and company data APIs for AI agents · All 231 leads comparisons

Which one, for what

Databar D

Best 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

Best 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

Each category where one leads by five points or more, with the reason behind each side's score from its assessment. The numbers are in the table below; this is what they stand for.

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

CategoryWeight this runDatabarZeroBounceEdge
Reliability16%202875ZeroBounce +47
Performance10%pendingpendingpendingnot scored in this run
Schema & documentation13%16.28454Databar +30
Agent ergonomics13%16.26669ZeroBounce +3
Security & auth14%17.54765ZeroBounce +18
Payments & pricing10%12.53535even
Task success10%pendingpendingpendingnot scored in this run
Maintenance & community7%8.87370Databar +3
Transparency & trust7%8.85563ZeroBounce +8
Negative events≤1500
TotalD 53.8/100B 62.4/100

Facts side by side

FactDatabarZeroBounce
KindHTTP APIHTTP API
VendorDatabar, Inc.Hertza L.L.C. (ZeroBounce)
Hosted endpointhttps://mcp.databar.ai/mcphttps://api.zerobounce.net/v2
TransportsHTTP, Streamable HTTP, SSE (legacy)HTTP, stdio
AuthOAuth or keyAPI key
PricingPaidPay per use
x402nono
LicenceProprietary, under Databar, Inc.'s terms of serviceProprietary service under ZeroBounce's terms of use; SDKs and the MCP server are open source
Tools exposed690
Read-only variant documentednono
llms.txtyesyes
Last release2026-10-302026-10-25
Terms last updated2026-10-012026-05-05
Privacy policy last updated2026-10-012026-06-30
Customer content may train modelsnot found in the textnot found in the text
Terms restrict automated accessnot found in the textnot found in the text
Terms restrict benchmarkingnot found in the textnot found in the text
Terms or service can change without noticenot found in the textyes
Arbitration or class-action waiveryesyes

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.

Other comparisons with Databar or ZeroBounce

Machine-readable

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