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Automation Agent · from $99

Hire an API integration developer without the freelancer hunt

Need two systems to talk to each other? Describe the APIs and the data that should move between them. Our agent quotes a fixed price in about a minute and builds an integration that handles failures and retries.

  • Fixed-price proposal in about a minute
  • Pay only if you accept
  • Engineer-reviewed delivery
  • 2 revisions · refund if we can't deliver

Post your API integration job

0/5000 · more detail = a sharper price

Free to post · no account · you only pay if you accept · from $99

Typical jobs & prices

What clients hire an API integration developer for

Indicative fixed prices. Your proposal is priced for your exact brief.

Connect a website form to a CRM through its REST API

from $99 ~1 day
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Receive and verify webhooks from a third-party service into your database

from $199 ~2 days
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Two-way contact sync between a CRM and an email marketing tool

from $499 ~4 days
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Order-to-shipping integration with a carrier API and tracking updates

from $599 ~5 days
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Accounting sync that posts invoices and payments to QuickBooks or Xero

from $799 ~6 days
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Integration service linking an ERP, a store and a warehouse system

from $2,499 ~18 days
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Integrations that hold up when an API misbehaves

API integration jobs look simple on paper: when an order is placed here, create a shipment there. The real work hides in details the documentation glosses over — OAuth tokens that expire, pagination that changes between versions, rate limits that kick in at month-end, webhooks that arrive twice or out of order, and fields marked optional in the docs that turn out to be required in practice.

Our agent reads the API references for both sides, maps fields between them in a table you approve, and writes the integration with idempotency keys, retry with backoff, and a dead-letter log for records that fail repeatedly. Webhook endpoints verify signatures before trusting a payload. For ongoing syncs, it keeps a cursor or timestamp so a restart picks up exactly where the last run ended, without duplicates.

Common pairings include a store and a shipping carrier, a CRM and an accounting system, a booking tool and a calendar, or your own app and a payments, SMS or maps provider. The code runs on your server or a serverless function you control, with secrets in environment variables. A GrahAI engineer reviews the field mapping and error handling, and you get a runbook explaining what to check when something goes wrong.

What you receive

  • Field-mapping document you approve before the build starts
  • Integration code with retries, idempotency and signature checks
  • Logging plus a failed-records queue you can replay
  • Deployment on your server or serverless account, secrets kept in environment variables
  • Runbook for common failures, with two revision rounds

When to hire a person instead

An agent is a poor fit for integrations that need a partner agreement, certification or signed contract with the API provider before access is granted. Those approvals need you and possibly a compliance lead; we can build once access exists.

Larger build? See custom projects

How it works

Hire an API integration developer in four steps

Step 1

Post your job

Describe what you need in plain words. No account, no bidding war, no profile to set up.

Step 2

Get a proposal in about a minute

An AI agent replies with deliverables, a plan, a fixed price and a delivery date. Ask it anything.

Step 3

Accept and pay securely

One fixed price, paid by card through secure checkout. International cards welcome; UPI in India.

Step 4

Receive reviewed work

Agents build it, an engineer reviews it, and it lands in your job room. Two revision rounds included.

Agent vs. hiring an API integration developer on a marketplace

Typical freelance marketplaceGrahAI agents
Time to first replyHours to days of waiting for bidsAbout a minute
Who you deal withAn individual you vet and manageOne accountable company
PriceVaries by freelancer; fees added at checkoutOne fixed price in the proposal
VettingYou read profiles and interviewNothing to vet — quality is our job
Quality checkDepends on the freelancerEngineer review on every delivery
If it goes wrongDispute processRevisions, then a full refund
Account needed to postYesNo

Weighing your options? Read our Upwork and Fiverr comparisons.

Hire an API integration developer: common questions

What does an API integration cost?
Simple one-direction pushes, like a form to a CRM, start at $99. Webhook receivers and single-object syncs run $199 to $499, while two-way syncs and accounting or shipping integrations usually fall between $499 and $999. Multi-system integration services cost $1,999 to $2,999 depending on the number of endpoints and edge cases involved.
What if the API I need is poorly documented?
That's common. The agent works from whatever exists — reference pages, a Postman collection, SDK source, or example responses you capture — and tests against a sandbox when one is offered. Gaps and assumptions are listed in the proposal, so the price covers the unknowns honestly rather than surprising you mid-job.
How do you prevent duplicate records?
Every record gets a stable external ID stored on both sides, and creates go through a lookup first. Webhook events are deduplicated by event ID, and requests to APIs that support idempotency keys include them. That way, a retried request or a webhook delivered twice updates the existing record instead of creating another.
Will I need to share my API keys?
Not in the job post. After kickoff you either add keys to your own environment yourself or hand them over securely, ideally as sandbox or limited-scope keys first. The code reads secrets from environment variables only, so they never appear in the repository, logs or delivery notes.
Can you integrate a GraphQL or SOAP API?
Yes. REST is most common, but the agent also handles GraphQL queries and mutations, SOAP services through WSDL-generated clients, and file-based exchanges over SFTP or CSV when an older system offers nothing else. Tell us what the provider supports, and the proposal will spell out how the connection will be made.

Get your API integration job priced in a minute

Free to post. No account. Pay only if you accept.

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