Defer

Fair

Agent Native Score

Free TierAPI Key Auth

Defer is a serverless job queue platform that allows developers to run background tasks and asynchronous jobs with automatic retries and scheduling. It provides a simple API for deferring function execution without managing infrastructure.

Categories: Job Queue · Serverless · Async Tasks

#2 of 2 in Job Queue · #4 of 5 in Serverless

Checklist Breakdown

12 of 33 checks passed. 14 unscored.

Discovery 50%

Can an agent find and understand this tool without a web search?

✗ Published OpenAPI/Swagger spec

✗ Has llms.txt or llms-full.txt

✗ Has an MCP server (official or well-maintained)

✗ MCP server listed in a public registry

✓ API reference docs are publicly accessible

✓ Docs include runnable code examples

✓ Has a public changelog or release notes

✓ Has a public status page

Auth & Onboarding 50%

Can an agent create an account and get credentials without human intervention?

✗ Signup does not require CAPTCHA

✗ Signup does not require phone verification

✓ Supports API key auth (not only OAuth)

✗ API key obtainable without manual approval

✓ No mandatory billing info to start

✓ Can sign up without creating an organization

Pricing 100%

Can an agent operate autonomously without upfront payment or contracts?

✓ Has a free tier

✓ Usage-based pricing available

✓ No minimum contract or commitment

✓ Pricing page is public (no 'contact sales')

✓ Free tier sufficient for testing (not just a trial)

Agent Tooling Not yet scored

How well does the API work for non-human consumers?

— SDK available in 2+ languages

— Structured error responses (JSON with error codes)

— Idempotency support on write endpoints

— Pagination on list endpoints

— Webhook/event support

— Sandbox or test mode available

— Rate limit headers in responses

— Consistent REST resource naming

Reliability Not yet scored

Does the tool fail gracefully when an agent makes a mistake?

— Meaningful error messages (not just 500)

— 429 responses include Retry-After header

— Documented uptime SLA (99.9%+)

— Graceful degradation under rate limits

— Request IDs in responses for debugging

— API versioning supported

Reviewer Notes

Defer has good documentation and a free tier with sandbox support, making it accessible for testing. However, it lacks critical agent-native integrations—no MCP server, OpenAPI spec, or llms.txt file limits discoverability. Account creation requires GitHub OAuth, blocking programmatic signup. The TypeScript/JavaScript SDK is well-designed with structured responses, but REST API support and multi-language SDKs are limited. The service appears reliable with standard rate limits and error handling, but the barrier to agent adoption remains the OAuth-only authentication and absence of formal API documentation standards.

Defer

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