IP.SB

IP.SB provides a free REST API for IP address information, offering endpoints to retrieve the caller's IP address in plain text or JSON, perform GeoIP lookups, DNS queries, domain WHOIS, speed tests, and more. The service requires no authentication, no API key, and supports CORS and JSONP for browser usage. Documentation is available at https://ip.sb/api/, pricing information at https://ip.sb/pricing/, and terms of use and privacy policy at the respective pages.

IP.SB is listed with 2 APIs on the APIs.io network. Tagged areas include Company, API, IP, GeoIP, and DNS.

The IP.SB catalog on APIs.io includes 1 JSON-LD context and 1 Spectral governance ruleset.

IP.SB’s developer surface includes documentation, pricing, support, and 15 more developer resources.

🌐 Visit website 📡 Profile data on GitHub

31.8/100 thin Agent 18/100 agent aware Full breakdown ↓
scored 2026-10-31 · rubric v0.25.0 · Show this score on your site →

2 APIs

CompanyAPIIPGeoIPDNS

Kin Score

Kin Score How this is scored →
scored 2026-10-31 · rubric v0.25.0

Composite quality — 31.8/100 · thin

Contract Quality 3.8 / 21

Developer Ergonomics 2.4 / 17

Access Clarity 8.9 / 17

Operational Transparency 2.3 / 11

Contract Governance 2.2 / 10

Discoverability 5.6 / 9

Regulatory Posture 4.3 / 15

Agent readiness — 18/100 · agent aware

Machine-Readable Contract 18 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Pagination 5 / 5

Distinct Operations 3 / 3

Regulatory Posture applies to this provider. Its tags matched the Horizontal (data, software, accessibility, platform) regime, so Regulatory Posture carries 15 points of the composite. If this regime is wrong for your business, say so on your provider repo — the applicability map is public and we will correct it.

Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

The six quality facets above are damped to 85 points between them, because the conditional facet above carries the other 15. That is why each facet's contribution is shown against a damped maximum: raising a quality facet moves the composite by 85% of its nominal weight, not 100%. The full arithmetic is at apis.io/rating/.

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Agent readiness — checks not met, largest first (exact, from this profile):

MCP Server +12 pts — deployment.mode + probe verdict on the mcp/ manifest, not the pointer; an unprobed slug falls back to authorship
Agentic Access Contract +10 pts — agentic_access artifact present (x-agentic-access), graded by author
Machine-Readable Auth +10 pts — a served openid-configuration/oauth-authorization-server carrying `issuer` (served), else the securitySchemes class in the provider OpenAPIs — bound (mutualTLS, DPoP, Signature) > negotiable (oauth2 authorizationCode/clientCredentials, openIdConnect) > bearer (http bearer, apiKey)
Idempotency +9 pts — OpenAPI mutating operations declare an idempotency key — a header, a request-body property, or a named de-duplication token whose own description says so (verified); else common[].type matches /idempoten/i (documented)
A2A Agent Card +8 pts — a2a/-a2a.yml manifest, graded on conformance.grade against A2A 1.0.0
Request/Response Examples +7 pts — share of operations carrying request/response examples; else an Examples / Code Samples link

10 more unmet checks in the Agent Readiness table above.

Kin Score — facets with the most composite points still available (weight × headroom):

Contract Quality scores 17.8 — up to +20.6 composite points
Developer Ergonomics scores 14.3 — up to +17.1 composite points
Operational Transparency scores 21.1 — up to +10.3 composite points

Each check links to what satisfies it. Publish the artifact, or tell us where it already lives, and the score moves on the next scoring run.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from the provider profile at artifacts.apis.io/ip-sb/apis.yml: open an issue on github.com/api-evangelist/ip-sb to ask a question or point us at an artifact you publish. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 2

Individual APIs this provider publishes, each with its own machine-readable definition.

IP.SB API

Free REST API for IP address information, providing endpoints for caller IP, GeoIP lookup, DNS queries, WHOIS, speed tests, and more. No authentication or API key required.

IP.SB API

IP.SB API as documented publicly: 1 operations. Contract generated from the documentation by API Evangelist (2026-10-28); not the provider's own document.

Pricing Plans 1

Published pricing tiers and plan structures.

Ip Sb Plans Pricing

2 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Ip Sb Rate Limits

1 limits

RATE LIMITS

Semantic Vocabularies 1

JSON-LD contexts and semantic vocabularies used across these APIs.

Ip Sb Context

1 classes · 0 properties

JSON-LD

Spectral Rules 1

Spectral governance rulesets for linting and validating these APIs.

IP.SB API Rules

12 rules · 10 errors 1 warnings 1 info

SPECTRAL

JSON Schema 1

Standalone JSON Schema definitions for this provider's data models.

GetIpResponse

1 properties

JSON SCHEMA

Security Posture 2

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Ip Sb Authentication

0 schemes

SECURITY

Ip Sb Domain Security

TLSv1.3 · HSTS · DNSSEC · DMARC

SECURITY

Scopes 1

OAuth scopes governing access to this provider's APIs.

Ip Sb Scopes

OAuth 2.0 · no documented scopes

0 scopes

SCOPES

Resources

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Spectral

JSONLD

Vocabulary

DataModel

ErrorCatalog

Conformance

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

RateLimits

RateLimits

Support

Support

Commercial 4

Pricing, plans, and the legal terms of use

Plans

Pricing

TermsOfService

PrivacyPolicy

Company 1

The organization behind the API

Website

Website

Other 2

Properties that don't map to a standard resource type

Hosts

Hosts

Vendors

Vendors

Source (apis.yml)

aid: ip-sb
name: IP.SB
description: IP.SB provides a free REST API for IP address information, offering endpoints to retrieve the caller's IP address
  in plain text or JSON, perform GeoIP lookups, DNS queries, domain WHOIS, speed tests, and more. The service requires no
  authentication, no API key, and supports CORS and JSONP for browser usage. Documentation is available at https://ip.sb/api/,
  pricing information at https://ip.sb/pricing/, and terms of use and privacy policy at the respective pages.
url: https://artifacts.apis.io/ip-sb/apis.yml
x-type: company
x-source: harvest:new-submission
x-tier: profiled
x-tier-reason: enrichment pass 2026-10-28 (modular-v1; was harvest)
specificationVersion: '0.20'
created: '2026-10-28'
modified: '2026-10-28'
tags:
- Company
- API
- IP
- GeoIP
- DNS
image: https://ip.sb/favicon.ico
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: RateLimits
  url: rate-limits/ip-sb-rate-limits.yml
- type: Plans
  url: plans/ip-sb-plans-pricing.yml
- type: Spectral
  url: rules/ip-sb-rules.yml
- type: JSONLD
  url: json-ld/ip-sb-context.jsonld
- type: Vocabulary
  url: vocabulary/ip-sb-vocabulary.yml
- type: DataModel
  url: data-model/ip-sb-data-model.yml
- type: ErrorCatalog
  url: errors/ip-sb-problem-types.yml
- type: Conformance
  url: conformance/ip-sb-conformance.yml
- type: LLMsTxt
  url: llms/ip-sb-llms.txt
- type: Hosts
  url: hosts/ip-sb-hosts.yml
- type: Vendors
  url: vendors/ip-sb-vendors.yml
- type: DomainSecurity
  url: security/ip-sb-domain-security.yml
- type: Website
  url: https://ip.sb/
- type: Documentation
  url: https://ip.sb/api/
- type: Pricing
  url: https://ip.sb/pricing/
- type: TermsOfService
  url: https://ip.sb/terms-of-use/
- type: PrivacyPolicy
  url: https://ip.sb/privacy-policy/
- type: Support
  url: https://ip.sb/contact/
apis:
- name: IP.SB API
  description: Free REST API for IP address information, providing endpoints for caller IP, GeoIP lookup, DNS queries, WHOIS,
    speed tests, and more. No authentication or API key required.
  humanURL: https://ip.sb/api/
  baseURL: https://api.ip.sb/
  aid: ip-sb:ip-sb-api-2
- aid: ip-sb:ip-sb-api
  name: IP.SB API
  description: 'IP.SB API as documented publicly: 1 operations. Contract generated from the documentation by API Evangelist
    (2026-10-28); not

    the provider''s own document.'
  humanURL: https://api.ip.sb
  baseURL: https://api-ipv4.ip.sb
  properties:
  - type: OpenAPI
    url: openapi/_ae-authored/ip-sb-openapi-generated.yml
    x-provenance: generated
  - type: JSONSchema
    url: json-schema/ip-sb-get-ip-response-schema.json
x-submission-probe: 200, 2026-10-26
x-coverage:
  state: unreadable
  reason: no-machine-readable-spec
  detail: The public API documentation at https://ip.sb/api/ describes endpoints but provides no OpenAPI or other machine‑readable
    specification.
  evidence:
  - url: https://ip.sb/api/
    status: 200
  checked: '2026-10-28'
x-enrichment:
  date: '2026-10-28'
  status: enriched
  artifacts_added: 28
  pass: modular-v1
  engine: identity=oss,contract=oss,surfaces=oss,docs=oss,regulatory=oss

IP.SB API — frequently asked questions

Does IP.SB have an API?

Yes. APIs.io lists 2 APIs from IP.SB, including IP.SB API and IP.SB API.

Is there an OpenAPI specification for the IP.SB API?

Yes. APIs.io indexes 1 OpenAPI specification for IP.SB, each linked for download from this page.

How do I authenticate with the IP.SB API?

IP.SB documents its authentication (0 schemes). The details are profiled on APIs.io as Ip Sb Authentication.

How much does the IP.SB API cost?

APIs.io lists 2 pricing plans for IP.SB, with each plan's price, limits and inclusions under Pricing Plans on this page.

Is the IP.SB API ready for AI agents?

IP.SB has a Kin Score of 31.8 out of 100 (thin) and an Agent Readiness score of 18.3 (agent-aware), scored by API Evangelist on 2026-10-31.

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