SecurityTrails vs WhoisXML API

SecurityTrails 5

The newest dated changelog entry is 28 May 2020, the Project API 1.7.0 entry is undated and the SurfaceBrowser changelog ends on 26 February 2019, so no change within 180 days was found (0 of 30). No entries in the last 90 days (0). A public changelog exists but is five years stale, and the support page is disallowed by robots.txt (3 of 25). No official SDK; the npm package of October 2021 names the vendor as author with no repository (0 of 15). The docs site serves llms.txt and Markdown twins, which shows the documentation platform is current (2 of 10). 0 + 0 + 3 + 0 + 2 = 5.

WhoisXML API 76

Read as a closed service with an official MCP server. MCP server 1.13.0 was published in the official registry on 3 November 2026 and the ProfessionalServices and ipgeo-community repositories were pushed the same day (30). 1.8.6 on 8 September through 1.13.0 on 3 November 2026 is nine registry versions in 90 days (20). Product updates are summarised in yearly press releases, the newest 9 May 2025, support is a contact form with tiered response times sold separately, and the client library repositories were last pushed in 2023 (8 of 15). The MCP server is in the official registry under io.github.whois-api-llc, and official Python and Go clients exist (15). The MCP server's source was not found on GitHub, and the SDK repositories show no activity since 2023 (3 of 10). 30 + 20 + 8 + 15 + 3 = 76.

SecurityTrails 20

Read with the hosted lines. status.securitytrails.com redirects to securitytrails.statuspage.io, which says it is inactive and visible to team members only, so no public status page (0) and no readable history (5). No rate limit numbers in the readable docs; the pricing page, which may carry them, answered a Cloudflare challenge (0). 429 is documented on the ping page with the message 'API rate limit exceeded' and no Retry-After or backoff guidance, and every v1 call is a read (5 of 15). No SLA found (0). The v1 API is live and not marked beta, though every operation id carries an '-old' suffix with deprecated set to false (10). 0 + 5 + 0 + 5 + 0 + 10 = 20.

WhoisXML API 65

Read with the hosted lines. The vendor's own Service Status and Data Releases page is linked from the docs and describes a per-API JSON status file with four levels (20). It shows no incident history and the status file's live values could not be read, so no 90-day record (5). The docs give 200 requests a second with rejection until the next second; the terms give 50 a second, 20 concurrent and 5 concurrent bulk requests, so numbers are published even though they disagree (15). A 429 AUTHENTICATE_06 carries Retry-After and every response X-RateLimit-Limit, X-RateLimit-Remaining and X-RateLimit-Reset, with guidance to slow before zero; all calls are reads (15). No SLA; the terms guarantee no minimum uptime and cite a historical 99.9 per cent, with enterprise SLAs by separate agreement (0). The API is generally available (10). 20 + 5 + 15 + 15 + 0 + 10 = 65.

SecurityTrails 32

A closed service whose terms couldn't be read because of the Cloudflare challenge (5 of 30, for a known commercial product with unread terms). The privacy policy was unread and no retention statement or DPA was found (0 of 30). No deprecation policy; the operation ids carry '-old' with deprecated set to false and no notice explains them (0 of 20). No subprocessor or data location statement readable (0 of 20). 5 + 0 + 0 + 0 = 5.

WhoisXML API 60

A closed service with clear terms naming Whois API, Inc. and California law, though they confine data to one site, bar sharing it and forbid AI training on it (15 of 30). The privacy policy was last modified on 6 April 2020, cites the Privacy Shield frameworks, keeps data as long as there is a reasonable basis, and names no DPA (6 of 30). Deprecated parameters are listed and still accepted, with no notice periods or policy (8 of 20). No subprocessors or data locations are named (2 of 20). 15 + 6 + 8 + 2 = 31.

SecurityTrails 0

No x402, MPP or L402 (0). securitytrails.com/app/pricing and /corp/pricing answered a Cloudflare challenge, and the docs name no price, so no public price was read (0). Whether a free plan exists couldn't be confirmed; the usage endpoint shows only that each account has a monthly allowance (0). A key comes from a browser signup on securitytrails.com, with no programmatic route found (0). 0 + 0 + 0 + 0 = 0, scored as Contentful and Personio were on 7 October 2026 when their pricing pages were unreadable.

WhoisXML API 25

No x402, MPP or L402 (0). The only public price is from $129 a month for a universal credit pool; per-credit rates are behind a calculator whose output was not read and enterprise packages are by sales (5 of 20). 500 free WHOIS credits on signup with no card (20). The key comes from the account after a browser signup and no key API was found (0). 0 + 5 + 20 + 0 = 25.

SecurityTrails 54

The reference pages are generated from an OpenAPI document (operation ids, deprecated flags and typed schemas show on each page), but no spec is published for download and docs.securitytrails.com/openapi redirects to 404 (12 of 25). llms.txt with a Markdown twin of every page (10). Each endpoint has a one-line purpose and nothing on when to use it or not (8 of 20). Path and query parameters are typed, the DNS history type is an enum of six values, and the ASI API has enums, operators and a 1 to 1,000 limit, but the v1 filter object is untyped strings and the DSL query is a free string whose grammar isn't documented (8 of 15). Example responses on every page, with errors mostly limited to 400 and a message, 401 and 429 only on the ping page and 422 on the ASI API (8 of 15). Versioned paths (/v1, /v2) and a changelog whose dated entries stop on 28 May 2020, with one undated Project API 1.7.0 entry (8 of 15). 12 + 10 + 8 + 8 + 8 + 8 = 54.

WhoisXML API 70

The surface graded is the WHOIS API, with the hosted MCP server noted. No OpenAPI document. JSON Schema draft-07 and XSD files define the WHOIS record, the DomainInfo response and the error body, and a Postman collection is published (15 of 25). llms.txt on www.whoisxmlapi.com lists the APIs, databases and feeds (10). The making-requests page states each parameter's purpose, default and credit cost, lists deprecated parameters that are still accepted, and says when RDAP applies, with little on when not to call (15 of 20). rdap, outputFormat and the cache flags have enumerated values and the record schema is typed, but unknown parameters are ignored silently and the output page gives no types in prose (11 of 15). Request examples, example records and an error table with HTTP status, errorCode and message (12 of 15). No API version and no changelog for the API; press releases summarise product updates yearly, the newest dated 9 May 2025, and the MCP server's versions are dated in the registry (7 of 15). 15 + 10 + 15 + 11 + 12 + 7 = 70.

SecurityTrails 56

include_ips on the list endpoints and an enrichments list on ASI asset search, which returns only custom tags by default, size responses on part of the surface; v1 lookups return fixed shapes (12 of 25). page with pages and max_page on v1 lists, scroll on the DSL endpoints, cursor pagination with limit up to 1,000 and filters with seven operators on the ASI API (16 of 20). Errors are a 400 message, 401 and 429 text strings and 422 detail arrays, with no codes to branch on (8 of 20). The overview says the v1 API is read-only, so retries are safe; the ASI tag endpoints write with no idempotency guidance (14 of 20). One required parameter per lookup besides the key. No official SDK found, and the npm securitytrails package from October 2021 has no repository or homepage (6 of 15). 12 + 16 + 8 + 14 + 6 = 56.

WhoisXML API 65

ignoreRawTexts drops the raw text fields, cmd=GET_DN_AVAILABILITY returns a two-field record, and the MCP server's reverse_whois defaults to a count-only mode; the MCP server lists 35 tools, more than 30, with a tool_search for deferred loading over stdio only (17 of 25). The WHOIS API returns one record per call with no pagination; bulk variants take up to 10,000 domains as jobs with status and results tools (8 of 20). Errors carry a code and a message an agent can branch on, though WHOIS_01 names both a validation error on HTTP 200 and an internal error on 500 (14 of 20). Every call is a read, and the cache flags make a repeat cheap, but a retry with _hardRefresh costs 5 credits each time and no annotations were found on the MCP tools (14 of 20). One required parameter, sensible defaults, and official Python and Go client libraries in the vendor's GitHub organisation, last pushed in 2023 (12 of 15). 17 + 8 + 14 + 14 + 12 = 65.