Nannostomus

Nannostomus provides a sex offender search API covering 771k+ offender records across all 50 U.S. states and 14 territories. It supports search by state and name, with monthly per-state record updates, deduplication, and 99.9% uptime backed by cloud infrastructure. A free tier covers up to 100 requests per month with tiered pay-as-you-go pricing beyond that.

Nannostomus publishes 1 API on the APIs.io network. Tagged areas include Public Safety, Sex Offenders, Government, Search, and Records.

Nannostomus’ developer surface includes documentation, pricing, support, and 3 more developer resources.

🌐 Visit website 📡 Source on GitHub

14.9/100 emerging ▬ flat Agent 3/100 human only saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

AccessFreemium

1 APIs

Public Safety Sex Offenders Government Search Records

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 14.9/100 · emerging

Contract Quality 0.0 / 21

Developer Ergonomics 3.6 / 17

Access Clarity 4.5 / 17

Operational Transparency 0.9 / 11

Contract Governance 0.0 / 10

Discoverability 5.0 / 9

Regulatory Posture 1.7 / 15

Agent readiness — 3/100 · human only

Machine-Readable Contract 0 / 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 0 / 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

Regulatory Posture applies to this provider. Its tags matched the Government & Public Sector 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/.

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 github.com/api-evangelist/nannostomus: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

APIs 1

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

Nannostomus Sex Offender API

The Nannostomus Sex Offender API enables search of 771k+ offender records by state and name across all 50 U.S. states and 14 territories. Records are updated monthly with per-st...

Pricing Plans 1

Published pricing tiers and plan structures.

Nannostomus Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Nannostomus Rate Limits

5 limits

RATE LIMITS

FinOps 1

Cost, billing, and metering signals for API financial operations.

Nannostomus Finops

FINOPS

Security Posture 1

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

Nannostomus Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Resources

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

Operate 1

Status, limits, changes, and where to get help

Support

Support

Commercial 1

Pricing, plans, and the legal terms of use

Pricing

Pricing

Company 2

The organization behind the API

LinkedIn

Website

Website

Source (apis.yml)

aid: nannostomus
name: Nannostomus
description: Nannostomus provides a sex offender search API covering 771k+ offender records across all 50 U.S. states and
  14 territories. It supports search by state and name, with monthly per-state record updates, deduplication, and 99.9% uptime
  backed by cloud infrastructure. A free tier covers up to 100 requests per month with tiered pay-as-you-go pricing beyond
  that.
type: Index
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: freemium
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Freemium
  confidence: medium
  source:
  - plans
  generated: '2026-07-22'
  method: derived
position: Consuming
access: 3rd-Party
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/nannostomus.png
url: https://raw.githubusercontent.com/api-evangelist/nannostomus/refs/heads/main/apis.yml
created: '2024-11-13'
modified: '2026-04-28'
specificationVersion: '0.23'
tags:
- Public Safety
- Sex Offenders
- Government
- Search
- Records
apis:
- aid: nannostomus:nannostomus
  name: Nannostomus Sex Offender API
  tags:
  - Sex Offenders
  - Public Safety
  - Search
  humanURL: https://www.nannostomus.com/api/
  properties:
  - url: https://www.nannostomus.com/api/
    type: Documentation
  - url: https://www.nannostomus.com/api/
    type: Reference
  description: The Nannostomus Sex Offender API enables search of 771k+ offender records by state and name across all 50 U.S.
    states and 14 territories. Records are updated monthly with per-state change reporting and deduplicated within each state.
common:
- type: DomainSecurity
  url: security/nannostomus-domain-security.yml
- type: LinkedIn
  url: https://www.linkedin.com/company/intsurfing
- url: https://www.nannostomus.com/
  type: Website
- url: https://www.nannostomus.com/api/
  type: Documentation
- url: https://www.nannostomus.com/pricing/
  type: Pricing
- url: https://www.nannostomus.com/contact/
  type: Support
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com

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