APIs built
for what comes next.
REST, GraphQL, gRPC. OpenAPI docs. AI-native API design. Fixed price, production-ready.
Afnexis Results
50+
APIs shipped
in production
<50ms
p99 latency target
production APIs
4-8 wks
to production
avg. timeline
4.9/5
client rating
30+ clients
WHAT WE BUILD
Which API do you need built?
REST API Design and Build
Resource-oriented design, OpenAPI 3.0 docs, client SDKs, versioning strategy. Built to last.
GraphQL APIs
Schema-first design, DataLoader for N+1 prevention, subscriptions for real-time. Apollo or Pothos.
AI and LLM APIs
Streaming endpoints for LLM responses, RAG pipelines as APIs, tool-calling endpoints for agents.
Auth and Security Layer
OAuth 2.0, API keys, JWT, rate limiting, IP allowlisting, CORS. Every API secure from day one.
Third-Party Integrations
Salesforce, Stripe, HubSpot, Twilio, SendGrid. We've built wrappers for every major SaaS API.
API Performance and Monitoring
p99 latency under 50ms. Redis caching, connection pooling, load testing with k6.
By Muhammad Aashir Tariq · CEO & Head of AI, Afnexis · Updated April 2026
REAL RESULTS
Numbers from real deployments.
<50ms
p99 latency
production APIs
50+
APIs shipped
in production
0
unversioned breaking changes
production record
4.9/5
client rating
30+ clients
"They built the API that powers our entire fintech platform. 50+ endpoints, Stripe integrated, under 40ms p99. Done in 6 weeks."
CTO · ShinyLoans · Fintech
HOW IT WORKS
From call to production in weeks.
Design
API contract first. We write the OpenAPI spec before any code. You review the interface, we build it.
Build
Test-driven development. Integration tests for every endpoint. No shipping without tests.
Document
Auto-generated docs, a Postman collection, and example responses for every endpoint.
PRICING
Fixed price. No surprises.
Ranges from 50+ real projects. Milestone billing. No retainers.
| Project Type | What's Included | Timeline | Starting At |
|---|---|---|---|
| REST API | Up to 20 endpoints, auth, docs, tests, staging + prod | 3-5 weeks | $15K |
| GraphQL API | Schema design, resolvers, DataLoader, subscriptions, docs | 4-7 weeks | $20K |
| AI/LLM API | Streaming endpoints, RAG integration, tool-calling, monitoring | 4-8 weeks | $25K |
| Enterprise API Platform | 50+ endpoints, multi-tenant, versioning, rate limiting, SLAs | 8-16 weeks | $70K |
FAQ
Quick answers.
REST vs GraphQL — which should I use?
REST for most use cases. GraphQL when your clients have very different data needs (mobile vs web vs third-party) and you want to avoid over-fetching. We'll recommend the right one in scoping.
Do you write API documentation?
Yes. OpenAPI 3.0 spec, Swagger UI, and a Postman collection. For client-facing APIs we also write a getting-started guide and code examples in JavaScript and Python.
How do you handle API versioning?
URL versioning (/v1/, /v2/) for REST. We never introduce breaking changes without a new version and a deprecation timeline.
Can you build APIs that work with LLMs and AI agents?
Yes. We design APIs specifically for agent tool-calling: consistent schemas, idempotency, good error messages, and streaming where needed.
READY TO START?
Let's build your first agent.
30-min call. No pitch. We map the workflow and quote it.