Insomnia vs Anthropic API
Open-source API client + design platform — the developer-first Postman alternative
vs. API for Claude — frontier models for chat, tool use, agents, and long-context reasoning
Pricing tiers
Insomnia
Free
$0. Unlimited local. Cloud sync with E2EE. 1 project. Local + Git storage. Up to 3 members.
Free
Pro
$5/user/mo annual. Unlimited projects, cloud sync + Git sync + Insomnia AI.
$5/mo
Enterprise
$25/user/mo. SSO, SAML, RBAC, audit log, dedicated SLA, VPC.
$25/mo
Anthropic API
Opus 4.7 — usage
Input $5 / output $25 / cache-write $6.25 / cache-read $0.50 per 1M tokens. Batch = 50% off.
Custom
Sonnet 4.6 — usage
Input $3 / output $15 / cache-write $3.75 / cache-read $0.30 per 1M tokens. Batch = 50% off.
Custom
Haiku 4.5 — usage
Input $1 / output $5 / cache-write $1.25 / cache-read $0.10 per 1M tokens. Batch = 50% off.
Custom
Free-tier quotas head-to-head
Comparing free on Insomnia vs opus-4-7 on Anthropic API.
| Metric | Insomnia | Anthropic API |
|---|---|---|
| discount batch | — | 50 % off |
Features
Insomnia · 19 features
- API Design (OpenAPI) — Spec editor + preview.
- Auth Helpers — OAuth, AWS, Hawk, Bearer, etc.
- Cloud Sync (E2EE) — Opt-in encrypted sync.
- Environments — Variables per env.
- Git Sync — Version with your repo.
- GraphQL — Query + schema explorer.
- gRPC — gRPC client.
- HTTP Client — REST request builder.
- inso CLI — Run API tests + lint specs in CI.
- Insomnia AI — AI-assisted request building.
- Local-First Storage — No account required.
- Mock Server — Build mocks from OpenAPI (Pro).
- Plugins — Extend via Node.js.
- Request Collections — Grouped requests.
- Scratch Pad — Local-only mode (re-added after backlash).
- SOAP — WSDL + SOAP.
- Teams — Shared workspaces.
- Templating Engine — Nunjucks + JS snippets.
- WebSockets — WS connection + messages.
Anthropic API · 0 features
Developer interfaces
| Kind | Insomnia | Anthropic API |
|---|---|---|
| CLI | inso CLI | Claude Code CLI |
| SDK | Plugin API | Go SDK, Java SDK, Python SDK, Ruby SDK, TypeScript SDK (@anthropic-ai/sdk) |
| REST | Insomnia Cloud API | AWS Bedrock, Google Vertex AI, Microsoft Azure AI, REST API (Messages + Agents) |
| OTHER | Git Sync (built-in), Insomnia Desktop | — |
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