SuprSend

Fair

Agent Native Score

Free TierAPI Key AuthOpenAPI Spec

SuprSend is a customer communication platform that enables multi-channel message orchestration across email, SMS, push, and in-app notifications through a unified API. It provides workflow automation and delivery optimization for transactional and marketing communications.

Categories: Communications · Notifications · Messaging

#42 of 63 in Communications · #9 of 9 in Notifications · #27 of 38 in Messaging

Checklist Breakdown

13 of 33 checks passed. 14 unscored.

Discovery 63%

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

SuprSend has a published OpenAPI spec and RESTful API with clear endpoint documentation, making agent integration feasible. The main strength is a free tier with sandbox environment for testing. However, account creation requires manual email signup with no programmatic API—agents cannot self-register. The platform lacks MCP server support and llms.txt file for discoverability. API responses are JSON-structured and reasonable for parsing, though error handling documentation could be more detailed. Reliability information is limited in public docs.

SuprSend

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