4 days · fixed price · fixed scope
One API integration, end to end, in 4 days
Daysprint's API Integration Sprint connects one third-party REST or GraphQL API - up to ~5 endpoints - end-to-end for $900 USD fixed in 4 days: auth, error handling, retries, tests and documentation.
$ daysprint ship api-integration-sprint+ Building api-integration-sprint… (4 days)✔ One REST/GraphQL API (~5 endpoints) or MCP server (~5 tools)✔ Auth + error handling✔ Tests included✔ Handover docs✔ Delivered in 4 days[ INCLUDED ]
What the $900 integration includes
- One REST/GraphQL API (~5 endpoints) or MCP server (~5 tools)
- Auth + error handling
- Tests included
- Handover docs
All prices in USD · you own the code · bugs fixed free for 14 days after handover
[ SCENARIOS ]
When two systems won't talk to each other
Your product needs a payment provider, CRM, or shipping API connected, and your team's roadmap can't absorb the detour.
Two systems in your business don't talk to each other, so a human re-types data between them every week.
A no-code connector covers most of what you need, but not the one part that matters most.
[ DETAILS ]
APIs I integrate: Stripe, Shopify, HubSpot, Xero, Twilio and more
Payments and billing - Stripe, PayPal and subscription billing APIs: checkout flows, webhooks, invoicing and reconciliation.
Commerce and operations - Shopify, shipping and inventory APIs, connected to your storefront or back office.
CRM and accounting - HubSpot, Xero, QuickBooks and similar: customer and invoice data kept in sync automatically. Typical pairs: Stripe to Xero or QuickBooks, Shopify to HubSpot, HubSpot to Salesforce.
Messaging and everything else - Twilio, email platforms, and any modern REST or GraphQL API with documentation. The hard parts transfer: auth, pagination, rate limits, idempotency, webhooks.
MCP servers - your own API exposed to Claude, ChatGPT and other AI assistants as a set of tools. Bitcompare's public MCP server (18 tools, on npm) is the pattern running live on one of my products; a first version with up to ~5 tools is this sprint's shape.
[ PROCESS ]
Four days, and what happens around them
- BRIEF
Send the brief
About two minutes in the form below. Guided questions turn your answers into a structured brief as you go. Links help more than polish: an existing site, a repo, API docs, whatever you already have.
- INSTANT
The acknowledgment
Lands while you're still on this page. It plays your brief back and confirms what happens next:
[ view the exact email ][ hide the email ]
inbox: the acknowledgmentSubject: Got your brief - fixed quote within 1 business day Hi [your name], Thanks for the brief - it's in the queue. You'll have a written fixed quote (or a couple of clarifying questions) within 1 business day. What you sent: Package: API Integration Sprint - $900 Timeline: [your timeline] Brief: [your brief, exactly as you wrote it] Anything to add - links, repo access, context - just reply to this email. - Dan Daysprint · https://www.daysprint.dev - 1 BIZ DAY
The written quote
Scope, price and ship date in one email, within 1 business day. If anything is unclear you get questions first - the quote never guesses.
[ view the quote shape ][ hide the quote shape ]
inbox: the written quoteSubject: Your Daysprint quote - API Integration Sprint Scope: • One REST/GraphQL API (~5 endpoints) or MCP server (~5 tools) • Auth + error handling • Tests included • Handover docs Price: $900 USD Delivery: 4 days from deposit and materials received Terms: 50% deposit · balance on delivery · 1 revision round · 14-day warranty · valid 7 daysThe shape every quote takes. Yours is written against your brief, and anything in [brackets] becomes a real number before it reaches you.
- DEPOSIT
You accept, the clock starts
Reply to accept and the 50% deposit invoice follows. The clock starts once the deposit, your API docs link and repo access are in - sandbox keys count as day-1 work rather than a start condition.
- DAY 1
Access and mapping
Sandbox keys, endpoint review, and a written plan of exactly what connects where, agreed before code is written. A gnarlier API than the docs let on surfaces here, as a re-quote before the build.
- DAYS 2–3
The build
Auth, the happy path, then the unhappy ones (errors, retries, rate limits), each with a test proving it.
- DAY 4
Revise and document
Your revision round, then documentation and handover: how it works, how to extend it, and what to watch, written for the next developer who touches it.
- SHIP
Delivery and handover
The balance is invoiced on delivery. Repo and accounts transfer to you, my access goes away, and the handover email covers what shipped and how to change it.
- +14D
The warranty window
Bugs in what shipped are fixed free for 14 days from handover. After that you have the code, the docs and no dependency on me.
[ NOT INCLUDED ]
What's not included
What sits outside the price, so nothing is a surprise at the invoice:
- More than ~5 endpoints - larger surfaces get a custom fixed quote
- Undocumented or legacy SOAP-era APIs - quoted after a look at what you're dealing with
- The user interface around the integration - available as a quoted addition
- Publishing an MCP server to npm and the public directories - the 4 days cover the server, tests and README; listing is a quoted addition
- Ongoing monitoring and operations - that's Automation Build territory
Gnarlier integrations get a quote after I've seen the API, priced for what it is.
[ FAQ ]
Cost, docs, access and tests
How much does an API integration cost?
$900 USD fixed for one REST or GraphQL API of up to ~5 endpoints - auth, error handling, retries, tests and documentation included. Most Stripe, CRM and shipping integrations fit that shape. Bigger surfaces or undocumented legacy APIs get a custom fixed quote after a look; either way the number in the quote is the number on the invoice. For contrast, comparable custom integrations are commonly quoted $2,000–$30,000 depending on complexity.
What if the API has terrible or missing documentation?
It's common enough to plan for. If the docs are thin, day 1's mapping step is where that surfaces - and if it turns out to be gnarly, you get a re-quote before the build starts.
Do you need access to our production systems?
Not to start - and I'd rather not until we have to. The build runs on sandbox or test credentials wherever the provider offers them, with least-privilege access. Production credentials only enter at the final cutover, and confidentiality is covered by the engagement terms.
What does 'tests included' mean in practice?
Automated tests covering the paths that matter: successful calls, auth failures, provider errors, and retry behaviour. They run in your repo so future changes to the integration get caught before they ship.
Which APIs have you worked with?
My own products run on integrations with finance data providers, payment systems and dozens of third-party sources, and Bitcompare publishes its own API and an MCP server on top of it - the pattern (auth, pagination, rate limits, idempotency, webhooks) transfers to almost any modern REST or GraphQL API.
Can you build an MCP server for our API?
Yes, and it's the same shape as this sprint. An MCP server turns your API into tools that Claude, ChatGPT and other assistants can call directly: each tool needs a clear schema, auth, error handling and a test, which is the work the $900 already covers. Up to ~5 tools ships in 4 days: the server, its tests and a README covering install and config, in your repo. Publishing it to npm and getting it listed in the public directories (Glama, PulseMCP) is a separate quoted step, because the listing reviews run on the directories' schedule rather than mine. Bitcompare's public server (@bitcompare/mcp-server, 18 read-only tools) went through both halves.
[ CONTACT ]
Start your API Integration Sprint
Answer what you can, and you'll have a written fixed quote within one business day, written by me. Melbourne-based, working globally.
or email hello@daysprint.dev