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REST · OpenAPI · Webhooks

API Development

OpenAPI-first REST services your partners and mobile apps can rely on.

  • REST and OpenAPI-first services with versioning and sandboxes.
  • Auth, rate limits, pagination, and idempotent writes.
  • Partner-friendly error shapes and webhook docs.
  • Contract tests before mobile and integrator launch.
  • We fix production incidents caused by undocumented changes.
40+ projects since 2022 IST · daily sync NDA-ready
View featured case study
Founder-led team · Surat, India · English-first delivery
WHAT WE OFFER

What we deliver for api development

Core deliverables

  • Versioned REST APIs
  • Auth & rate limiting
  • Partner sandboxes
  • Webhook delivery
  • Contract & load tests

Why teams choose this engagement

  • REST or GraphQL APIs with OpenAPI documentation
  • Authentication, authorization, and admin interfaces
  • Database design, migrations, and backup strategy
  • Integration with payments, CRM, and third-party APIs
CHALLENGES

Problems we solve in api development

  • Version churn breaks integrators

    Partners need deprecation windows and changelog discipline. We version REST APIs with documented migration paths, not breaking changes on Friday.

  • Webhooks delivered once and forgotten

    Retry logic, signing secrets, and dead-letter queues must be tested on staging before billing or CRM sync goes live.

  • Rate limits surprise production partners

    Throttling and quota headers need agreement before sandboxes open. We document limits in OpenAPI, not support tickets.

  • Auth schemes inconsistent across endpoints

    OAuth, API keys, and scoped tokens confuse integrators when every resource invents a pattern. We standardize early.

OUR APPROACH

How we build api development

Founder-led engineers in Surat (IST) with morning and end-of-day updates so distributed product owners stay in the loop.

APIs are contracts. We design REST and OpenAPI-first services with versioning, auth, rate limits, and partner sandboxes, so your mobile app and integrators do not break silently.

We have fixed production incidents caused by 'small' API changes that nobody documented.

Teams with external integrators or mobile clients depending on stable contracts.

REST

APIs with clear contracts

API products live or die on OpenAPI quality. We ship versioned REST with pagination, error codes, and partner sandboxes before you announce a developer portal.

  • OpenAPI published on staging from discovery
  • Contract and load tests on auth and webhook paths
  • Changelog and deprecation policy in writing
PARTNERS

Sandboxes integrators actually use

Developer experience is delivery. Example clients, Postman collections, and webhook replay tools reduce partner onboarding from weeks of Slack to self-serve staging.

  • Signed webhooks with retry and dead-letter handling
  • Rate limits and quota headers documented in OpenAPI
  • Mutual NDA before production keys or schema access
INDUSTRIES

Where we apply api development

Vertical experience from shipped products, not generic claims.

WHY US

Why teams choose us for api development

Six reasons founders and product leads pick us over a generalist shop - scoped to how we deliver this engagement.

  • Contracts are law

    Breaking changes go through version bumps and comms.

  • Sandbox environments

    Partners test without touching production data.

  • Webhooks done right

    Retries, signatures, and idempotency keys included.

  • Postman plus OpenAPI

    Examples your integrators actually use.

  • Handover that sticks

    Deploy docs and dependency hygiene so your next hire is not blocked.

  • Structured daily updates

    IST business hours with a morning check-in and EOD summary on your channel. Live sync calls scheduled at kickoff when you need them.

HONEST FIT

Is this for you?

Good fit

  • Partners or mobile clients depend on your endpoints.
  • You need webhooks, pagination, and idempotent writes.
  • You want SDK-friendly error shapes.
  • Mobile apps or partners depend on stable, versioned endpoints.
  • You need pagination, webhooks, and clear error contracts.
  • You want partner sandboxes and OpenAPI docs from sprint one.

Probably not

  • Your 'API' is three internal cron scripts.
  • Your API is three internal cron scripts, not a product surface.
  • You refuse to document breaking-change policy for integrators.
  • You need GraphQL only because it is trendy, with no client need.
HOW WE WORK

Delivery process for api development

How we design APIs integrators can trust through versioning and tests.

We audit existing code or map greenfield requirements - auth, data boundaries, and partner integrations first. You leave with risk priorities ranked, not a generic rewrite quote.

  1. API design

    We audit existing code or map greenfield requirements - auth, data boundaries, and partner integrations first. You leave with risk priorities ranked, not a generic rewrite quote.

  2. Implement and document

    OpenAPI specs, error shapes, pagination, and versioning strategy agreed before migrations ship. Mobile and partner teams integrate against contracts, not tribal knowledge.

  3. Partner readiness

    PR-first delivery with CI on every merge, integration tests on webhooks and payments, and staging sandboxes. Admin and API changes stay in the same sprint rhythm when both exist.

  4. Operate

    Permission review, secrets rotation plan, and load checks on critical paths before production traffic. Backward-compatible schema changes with rollback scripts when data is involved.

TECHNOLOGIES

Stack for api development

Tools and runtimes we use on this type of engagement - chosen for production delivery, not slide-deck logos.

  • FastAPI
  • Django REST
  • OpenAPI
  • PostgreSQL
WORKFLOW

How we work on api development

  • PR-first delivery

    Every change reviewed with CI status visible to your team.

  • OpenAPI specs

    Contract updates published when endpoints change.

  • Staging data

    Realistic fixtures for integration testing before prod.

  • Direct access

    Engineers on Slack, not account-manager relay.

DEPLOYMENT

Production discipline for api development

  1. Auth hardening

    Secrets rotation and permission checks before scale. Least-privilege service accounts; no shared production keys in chat.

  2. Migration safety

    Backward-compatible schema changes with rollback scripts tested on staging. Long migrations run in phases, not as a Friday surprise.

  3. Webhook reliability

    Retries, idempotency keys, and partner sandbox tests before production traffic. Dead-letter handling documented for failed deliveries.

  4. Blue/green or canary

    Promotion strategy matched to your traffic profile and risk tolerance. Smoke tests gate every promote step.

OUTCOMES

Track record from api development

Metrics from shipped products and active engagements - not slide-deck claims.

40+
APIs and backends shipped
OpenAPI
Contracts on every engagement
IST
Morning & EOD sync
NDA
Before repository access
CASE STUDIES

Proof from api development

Real products we shipped for founders in the US, UK, and Europe.

Technical buyers want proof we ship APIs partners can integrate - with OpenAPI docs, staging sandboxes, and production systems still running in year three.

  • Partners can't integrate our API

    HerKey and AstroSure show production APIs with auth, webhooks, and mobile clients.

  • Worried about legacy migration

    Case studies include platforms we inherited, audited, and extended - not greenfield only.

  • Need OpenAPI discipline

    We document contracts and ship staging sandboxes before partners go live.

HerKey – Career Platform for Women - SparkScribe Technologies case study SaaS · Community
HR Tech Ongoing

HerKey – Career Platform for Women

Multi-role B2B career community platform

What they needed: HerKey needed a production-grade platform that could support multiple user roles, content moderation, and partner integrations without a rewrite every quarter.

Our approach: Before build, SparkScribe worked with HerKey to translate their SaaS / Marketplace goals into an actionable plan — not an off-the-shelf template.Discovery & planningMapped data ownership across candidates, employers, mentors, and admins before expanding engagement …

A Django platform connecting women professionals with mentors, jobs, and community features - built for scale with real authorization rules.

  • Python
  • Django
  • PostgreSQL
  • Redis
  • React
View case study
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Hire us

Engagement models for api development

API development for partner platforms, mobile backends, or webhook systems with written contracts.

  • Fixed-scope project

    Discovery, written requirements, and milestone billing. Best for MVPs, redesigns, and integrations with a defined end state.

    • Duration: Phased milestones
    • Working: Sprint plan agreed upfront
    • Billing: Per milestone or phase
    • Timeline: Based on signed scope

  • Dedicated squad

    A focused engineering squad on your product: weekly demos, shared backlog, and one accountable team when scope evolves.

    • Duration: 8 hrs/day · 5 days/week
    • Working: ~160 hrs/month capacity
    • Billing: Monthly invoice
    • Timeline: Sprint-based delivery

  • Part-time retainer

    Smaller monthly hour buckets for fixes, dependency updates, and enhancements, with the same engineers when possible.

    • Duration: 4 hrs/day · 5 days/week
    • Working: ~80 hrs/month
    • Billing: Monthly retainer
    • Timeline: Ongoing support window
Mutual NDA before codebase access Morning & EOD IST sync Written scope before sprint one
RELATED SERVICES
FAQ

Questions about api development

What prospects ask on a first call about this service: scope, timelines, fit, and how we work.

  • Scope & pricing
  • Delivery process
  • Handover & IP
  • NDA & quality gates
  • Written scope before sprint one milestones, owners, and what stays out of v1 are documented before build starts.
  • Weekly staging demos with the engineers writing your features, not a status deck relay.
  • Your IP in the contract code, designs, and docs transfer to you on agreed milestones.
  • Mutual NDA upfront before you share product details, credentials, or repository access.

5 questions

Do you treat APIs as products with versioning and docs?

Yes. Versioning policy, deprecation windows, and OpenAPI are part of scope, not an afterthought.

How do you onboard partner developers to our API?

Sandbox keys, examples, error catalog, and webhook docs with retry semantics spelled out.

Can you harden an API that is already in production?

We audit auth, rate limits, and breaking changes, then fix highest-risk paths first with contract tests.

REST, GraphQL, or webhooks for our use case?

We recommend based on clients and ops burden. Most B2B products start REST plus webhooks for events.

What SLAs can you help us meet for API uptime?

We design health checks, graceful degradation, and observability; SLA targets are agreed against realistic architecture.

GET STARTED

Shipping partner APIs? Let's publish contracts.

Describe consumers, auth model, and SLAs. We deliver versioned REST (or GraphQL where fit) with OpenAPI docs, staging keys, and load tests before partners integrate.

  • Auth boundaries and rate limits defined upfront.
  • Load tests for expected partner traffic.