NetworkCalc website screenshot

NetworkCalc

NetworkCalc provides a free RESTful API platform for monitoring and managing business networks and domains. Public APIs include a subnet calculator, DNS tools, security tools, encoder, and binary converter, with additional authenticated APIs for alerts, authorization, domains, reports, and subnets.

NetworkCalc publishes 5 APIs on the APIs.io network, including Binary Converter API, DNS API, Encoder API, and 2 more. Tagged areas include Networking, DNS, Security, Subnetting, and Domains.

NetworkCalc’s developer surface includes documentation and 3 more developer resources.

🌐 Visit website 📡 Source on GitHub
33.0/100 thin ▬ flat Agent 22/100 agent aware Full breakdown ↓
scored 2026-07-28 · rubric v0.6
AccessFreemium
5 APIs
NetworkingDNSSecuritySubnettingDomainsCalculator

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-28 · rubric v0.6
Composite quality — 33.0/100 · thin
Contract Quality 11.9 / 25
Developer Ergonomics 1.7 / 20
Commercial Clarity 7.9 / 20
Operational Transparency 4.1 / 13
Governance 0.0 / 12
Discoverability 7.4 / 10
Agent readiness — 22/100 · agent aware
Machine-Readable Contract 18 / 18
Agentic Access Contract 10 / 10
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
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/networkcalc: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 5

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

NetworkCalc Binary Converter API

Binary, decimal, and hexadecimal conversions.

NetworkCalc DNS API

DNS lookups and record queries.

NetworkCalc Encoder API

Encoding and decoding helpers.

NetworkCalc Security API

TLS/SSL certificate and security utilities.

NetworkCalc Subnet Calculator API

IPv4 and IPv6 subnet calculations.

Pricing Plans 1

Published pricing tiers and plan structures.

Networkcalc Plans Pricing

3 plans

PLANS

Rate Limits 1

Documented rate limits and quota policies.

Networkcalc Rate Limits

5 limits

RATE LIMITS

FinOps 1

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

Networkcalc Finops

FINOPS

Security Posture 1

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

Networkcalc Domain Security

TLSv1.3 · HSTS · DNSSEC

SECURITY

Agentic Access 1

Recommended x-agentic-access execution contracts for AI agents.

Networkcalc Agentic Access

6 operations

6 operations · 0 acting

AGENTIC

Resources

Documentation 1

Reference material describing how the API behaves

Documentation
Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

AgenticAccess
AgenticAccess

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity

Company 1

The organization behind the API

Website
Website

Source (apis.yml)

apis.yml Raw ↑ 
aid: networkcalc
name: NetworkCalc
description: NetworkCalc provides a free RESTful API platform for monitoring and managing business networks and domains. Public
  APIs include a subnet calculator, DNS tools, security tools, encoder, and binary converter, with additional authenticated
  APIs for alerts, authorization, domains, reports, and subnets.
type: Index
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: Consumer
access: 3rd-Party
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/networkcalc.png
tags:
- Networking
- DNS
- Security
- Subnetting
- Domains
- Calculator
created: '2025-02-09'
modified: '2026-05-19'
url: https://raw.githubusercontent.com/api-evangelist/networkcalc/refs/heads/main/apis.yml
specificationVersion: '0.19'
apis:
- aid: networkcalc:networkcalc-binary-converter-api
  name: NetworkCalc Binary Converter API
  description: Binary, decimal, and hexadecimal conversions.
  humanURL: https://networkcalc.com/
  baseURL: https://networkcalc.com/api
  tags:
  - Binary Converter
  properties:
  - type: OpenAPI
    url: openapi/networkcalc-binary-converter-api-openapi.yml
  - type: Documentation
    url: https://networkcalc.com/api/docs
  - type: Subnet Calculator Docs
    url: https://networkcalc.com/api/docs/subnet-calculator
  - type: DNS Tools Docs
    url: https://networkcalc.com/api/docs/dns
  - type: Security Tools Docs
    url: https://networkcalc.com/api/docs/security
  - type: Encoder Docs
    url: https://networkcalc.com/api/docs/encoder
  - type: Binary Converter Docs
    url: https://networkcalc.com/api/docs/binary-converter
- aid: networkcalc:networkcalc-dns-api
  name: NetworkCalc DNS API
  description: DNS lookups and record queries.
  humanURL: https://networkcalc.com/
  baseURL: https://networkcalc.com/api
  tags:
  - DNS
  properties:
  - type: OpenAPI
    url: openapi/networkcalc-dns-api-openapi.yml
  - type: Documentation
    url: https://networkcalc.com/api/docs
  - type: Subnet Calculator Docs
    url: https://networkcalc.com/api/docs/subnet-calculator
  - type: DNS Tools Docs
    url: https://networkcalc.com/api/docs/dns
  - type: Security Tools Docs
    url: https://networkcalc.com/api/docs/security
  - type: Encoder Docs
    url: https://networkcalc.com/api/docs/encoder
  - type: Binary Converter Docs
    url: https://networkcalc.com/api/docs/binary-converter
- aid: networkcalc:networkcalc-encoder-api
  name: NetworkCalc Encoder API
  description: Encoding and decoding helpers.
  humanURL: https://networkcalc.com/
  baseURL: https://networkcalc.com/api
  tags:
  - Encoder
  properties:
  - type: OpenAPI
    url: openapi/networkcalc-encoder-api-openapi.yml
  - type: Documentation
    url: https://networkcalc.com/api/docs
  - type: Subnet Calculator Docs
    url: https://networkcalc.com/api/docs/subnet-calculator
  - type: DNS Tools Docs
    url: https://networkcalc.com/api/docs/dns
  - type: Security Tools Docs
    url: https://networkcalc.com/api/docs/security
  - type: Encoder Docs
    url: https://networkcalc.com/api/docs/encoder
  - type: Binary Converter Docs
    url: https://networkcalc.com/api/docs/binary-converter
- aid: networkcalc:networkcalc-security-api
  name: NetworkCalc Security API
  description: TLS/SSL certificate and security utilities.
  humanURL: https://networkcalc.com/
  baseURL: https://networkcalc.com/api
  tags:
  - Security
  properties:
  - type: OpenAPI
    url: openapi/networkcalc-security-api-openapi.yml
  - type: Documentation
    url: https://networkcalc.com/api/docs
  - type: Subnet Calculator Docs
    url: https://networkcalc.com/api/docs/subnet-calculator
  - type: DNS Tools Docs
    url: https://networkcalc.com/api/docs/dns
  - type: Security Tools Docs
    url: https://networkcalc.com/api/docs/security
  - type: Encoder Docs
    url: https://networkcalc.com/api/docs/encoder
  - type: Binary Converter Docs
    url: https://networkcalc.com/api/docs/binary-converter
- aid: networkcalc:networkcalc-subnet-calculator-api
  name: NetworkCalc Subnet Calculator API
  description: IPv4 and IPv6 subnet calculations.
  humanURL: https://networkcalc.com/
  baseURL: https://networkcalc.com/api
  tags:
  - Subnet Calculator
  properties:
  - type: OpenAPI
    url: openapi/networkcalc-subnet-calculator-api-openapi.yml
  - type: Documentation
    url: https://networkcalc.com/api/docs
  - type: Subnet Calculator Docs
    url: https://networkcalc.com/api/docs/subnet-calculator
  - type: DNS Tools Docs
    url: https://networkcalc.com/api/docs/dns
  - type: Security Tools Docs
    url: https://networkcalc.com/api/docs/security
  - type: Encoder Docs
    url: https://networkcalc.com/api/docs/encoder
  - type: Binary Converter Docs
    url: https://networkcalc.com/api/docs/binary-converter
common:
- type: AgenticAccess
  url: agentic-access/networkcalc-agentic-access.yml
- type: DomainSecurity
  url: security/networkcalc-domain-security.yml
- type: Website
  url: https://networkcalc.com/
- type: Documentation
  url: https://networkcalc.com/api/docs
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com