System Integrations

Custom API Integration—REST, GraphQL, Webhooks, Legacy XML, Production Middleware

Teenva AI & Digital Ventures provides custom API integration services from Bangalore, India—connecting your web app, travel portal, SaaS product, or internal tools to any third-party system via REST, GraphQL, SOAP/XML, webhooks, and middleware.

Named connectors like WhatsApp, Zoho, Stripe, Razorpay, and SiteMinder have dedicated pages. This service covers everything else—and the custom glue when off-the-shelf plugins break at scale.

API integration services by Teenva AI

Get your APIs integrated

REST, GraphQL, webhooks, and middleware—built for volume, security, and maintainability.

sales@teenvaai.com · +91 9572020107

What we integrate

CategoryExamples
ERP & accountingTally bridges, SAP hooks, custom finance exports
Logistics & shippingCourier tracking, label APIs, warehouse WMS
HR & payrollEmployee sync, attendance systems
Marketing & analyticsCRM adjacent tools, ad platform conversions API
Identity & SSOOAuth2/OIDC, SAML (scoped), SCIM
Legacy enterpriseSOAP, XML-RPC, CSV SFTP drops, AS2 (scoped)
Partner B2B APIsWhite-label supplier feeds, affiliate postbacks
Internal microservicesEvent buses, gRPC between your own services
AI & dataLLM tool calls, vector DB, enrichment pipelines

Travel GDS and supplier APIs (Amadeus, Sabre, bedbanks) are covered under travel API integration—we often deliver both on one platform.

Integration types we build

TypeWhen to use
Synchronous REST/GraphQLSearch, create, update in realtime user flow
Inbound webhooksPartner pushes events (payment, shipment, booking)
Outbound webhooksYour app notifies partners on state change
Batch / ETLNightly catalog, inventory, or accounting sync
Middleware layerTranslate formats between System A and System B
Queue workersHigh volume, rate limits, retry with backoff
Polling fallbackWhen vendor has no webhooks
API gateway / BFFSingle front door for mobile and web clients

Common custom integration scenarios

Replace manual CSV imports

Ops exports orders from portal → spreadsheet → ERP. We automate: webhook or cron pulls new orders, maps fields, posts to ERP API, logs success/failure with replay.

Legacy XML ↔ modern JSON

Supplier sends XML booking over HTTP POST; your Laravel app expects JSON. Middleware validates schema, transforms, stores audit copy, forwards to booking service.

Multi-vendor aggregation

One search endpoint calls three supplier APIs in parallel, normalizes results, applies business rules—pattern used in travel and ecommerce aggregators.

Partner white-label feed

You expose documented REST to sub-agents; we implement auth (API keys/JWT), rate limits, and usage logging.

Event-driven architecture

Booking confirmed → queue → CRM update + email + WhatsApp template + accounting entry.

REST webhook middleware patterns

Zapier runs out of steam when you need complex transforms, high volume, or travel-specific idempotency.

We build code you own—deployed on your infra or ours.

Technical standards we follow

AreaPractice
AuthenticationOAuth2, API keys, mTLS (scoped)—secrets in vault/env
IdempotencyKeys on create/charge; webhook dedup by event ID
Rate limitsRespect vendor limits; client-side throttling and queues
Error handlingStructured errors, retry only on transient codes
VersioningPin API version; upgrade runbook documented
LoggingCorrelation IDs across systems; PII redaction
TestingContract tests, sandbox fixtures, mock servers
DocumentationOpenAPI/field mapping per integration
API middleware architecture

Who we work with

  • SaaS startups
  • Travel platforms
  • Ecommerce brands
  • Enterprises
  • Agencies
  • AI products

Why Teenva AI

  • Full-stack ownership

    We build the app and the integrations—fewer handoffs
  • Travel depth

    Complex booking state machines alongside travel technology
  • Named + custom

    Stripe and your proprietary supplier API on one team
  • India + global

    Bangalore team, production systems worldwide
  • Long-term support

    Managed IT and DevOps monitoring when APIs change
Why Teenva AI for custom API integration

Tech stack (typical)

BackendLaravel, Node.js, Python (scoped)
Frontend / BFFNext.js API routes
QueuesRedis, SQS, RabbitMQ, Laravel Horizon
StoragePostgreSQL, MySQL, audit object storage
ObservabilityStructured logs, metrics, optional APM
CI/CDCI/CD pipeline services for safe deploys

We match your existing stack when integrating into a brownfield app.

Our API integration process

API integration process
  1. Discovery

    systems, objects, volumes, SLAs, compliance (PCI/PII)

  2. Vendor review

    read API docs, sandbox access, certification requirements

  3. Mapping document

    field-level spec, transforms, error code matrix

  4. Sandbox build

    happy path + failure cases

  5. Security pass

    auth storage, webhook signatures, least privilege

  1. Load & edge tests

    rate limits, duplicates, partial failures

  2. Production cutover

    feature flag, rollback, smoke tests

  3. Runbook

    on-call steps, replay queue, vendor contacts

  4. Monitor

    dashboards for success rate, latency, queue depth

Custom API vs named integrations

Custom API integration (this page)Named integration pages
Any vendor without a dedicated Teenva pageWhatsApp, Zoho, Stripe, Razorpay, SiteMinder
Middleware between your systemsBest-practice templates for those products
Legacy SOAP/XML, ERP, logisticsDeep product-specific FAQs

Custom business APIs vs travel GDS

Custom / business APIs (this page)Travel API integration
ERP, logistics, CRM-adjacentAmadeus, Sabre, Travelport, bedbanks, NDC

Monitoring & support

  • Success/failure rates per endpoint
  • Alert on webhook backlog or error spike
  • Admin UI to replay failed sync rows
  • Optional DevOps monitoring integration

Broken live integration? Get support for your existing website.

API monitoring dashboard
Third party API ecosystem

Frequently asked questions

Yes—that is the core of this service. We review vendor docs and sandbox access first.

Yes, if you have a stable codebase and clear ownership of deployments.

We follow what the vendor exposes; we add GraphQL BFF on your side when it helps mobile/web clients.

Pinned versions in prod, changelog review, staged upgrade with regression tests.

We implement signature verify, persistent queue, dead-letter, and alerts—same pattern as payment integrations.

Common in travel and enterprise—we build transformers and schema validators.

No—GDS/supplier work is travel API integration. We often do both on one project.

Yes—AI solutions for chatbots calling your APIs via tool use.

Simple webhook: weeks. Multi-system ERP with legacy XML: months—phased milestones.

Get support for existing website via managed IT support.

Build your custom API integration

OAuth, retries, idempotency, mapping docs, and monitoring—not one-off scripts that fail on the first API version bump.

Get your APIs integrated

Ready to take your business to the next level?