30 platforms · one key
Integrations
Every platform below connects through OAuth — or the platform's own application password — to the end user's own account. The rate limit is theirs, the data stays in their tenant, and revoking consent on their side ends it on ours.
How a connection works
Ask for the consent URL
Your product calls the platform's auth/url route from its dashboard session. It answers with a URL bound to your project and a state nonce.
The user consents on the platform
They sign in to Shopify, Google, Slack — wherever — and grant the scopes. The platform redirects to castomAPI's callback; the state round-trip is the CSRF guard.
Call with your key
From then on every call to that platform's group is an ordinary castomAPI call with x-api-key. Tokens are stored encrypted and refreshed on demand. Several accounts on one platform? Name one with accountId; an ambiguous call answers 400 with the list rather than guessing.
Verify 36
Thirty-six checks: IBAN, VAT, NIP, PESEL, REGON, phone, e-mail, sanctions, VIN, cards, addresses and more.
Crypto 2
Encrypt and decrypt with the platform's keys, so nothing sensitive travels or rests in the clear.
Convert 13
Currencies, colours, coordinates, timestamps, data formats, encodings, numerals, casing — one call each.
Generate 14
Hashes, secrets, RSA keypairs, QR codes, screenshots, PDFs and DOCX from HTML, names and identities for test data.
Parse 10
Receipts, invoices (KSeF, ZUGFeRD), e-mails, files, webhooks, user agents, JSON and JSON Schema — into structure.
Minify 8
HTML, code, JSON, SVG, SQL, GraphQL, URLs and image metadata, made smaller without changing meaning.
Utilities 11
DNS, GeoIP, weather, domain checks, disposable e-mail, image search, OCR, PDF to text and image, Excel to JSON.
Scrape 8
One page, its images, its favicon, its Google reviews, a CEIDG record, a content moderation verdict, a site's stack.
Crawl 3
Whole sites: basic, deep, or every image — with limits you set and a structure you can index.
SERP 7
Search results, keyword research, rivals, cannibalisation, mobile tests and element counts.
Trends 5
Interest over time and by region, suggestions, top charts and what is trending now.
Proxy 10
Safe fetch, stealth fetch, CORS, image transforms, RSS and XML to JSON, CSV streams, cache acceleration, an LLM relay, webhook relay.
AI 1
A UX audit of any URL: multi-viewport screenshots read by a vision model, with concrete suggestions.
Email 2
Read and send over the customer's own IMAP and SMTP — stateless, nothing stored.
Shopify 12
Products, orders, customers and inventory of the merchant's own store.
Shoper 12
The Polish storefront platform: products, orders, categories through the store's own key.
WordPress 11
Posts, pages, media and users on any site, through the Castomo WordPress Link plugin's API key.
WooCommerce 16
Read only, for now: the merchant approves the connection in their own store, and from there you can read products and their variations, orders with their notes and refunds, customers, categories, tags, attributes and the store's own basics. Nothing writes back to the store yet.
Snapchat Ads 25
Organisations, ad accounts, campaigns, creatives and stats. The core is live-verified; some later operations are not measured against the live API yet.
Facebook 22
Pages, posts, comments and insights for the Pages the user manages. Open to our own tester accounts only while Meta App Review is pending.
Instagram 18
Media, publishing, comments, mentions and insights of a professional account.
TikTok 14
Videos, publishing and creator info through the user's own TikTok connection — sandbox only, while TikTok reviews our production access.
LinkedIn 6
Publish a share to the member's own profile. Reading posts back, comments, reactions and share stats need partner access LinkedIn has not granted.
Pinterest 12
Boards, pins and analytics of the user's own account. Reads work today; writes are blocked until Pinterest approves an access upgrade.
Twitch 19
Streams, channels, clips, chat, moderation and schedules.
Slack 12
Channels, messages, files, users and reactions in the user's own workspace.
Discord 14
Guilds, channels, messages, members, roles and interactions.
Notion 14
Pages, databases, blocks and search in the user's workspace.
Asana 28
Projects, sections, tasks, subtasks, tags, comments, attachments and status updates.
Trello 32
Boards, lists, cards, checklists, labels, members and webhooks.
Miro 32
Boards, items, connectors, tags, members and exports.
Monday 15
Boards, items and updates on monday.com.
Calendly 20
Event types, scheduled events, invitees, availability, routing forms and webhooks on the user's own Calendly.
Typeform 20
Forms and their responses.
Google Workspace 44
Sheets, Docs, Drive, Calendar, Slides, Gmail and Meet — through granular consent on the user's own Google account.
Microsoft 365 17
Mail, calendar, files and Teams through the user's own Microsoft account.
Dropbox 17
Files, folders, sharing and search in the user's Dropbox.
HubSpot 14
Contacts, companies, deals, tickets and properties in the user's portal.
Salesforce 12
SObjects, SOQL, composite and batch calls against the user's own org.
Airtable 8
Bases, tables, schema and records — read, create, update, upsert, delete.
Zapier 15
Hooks, schemas, batches, async jobs, transforms and budget guards for Zapier-style automation.
GitHub & GitLab 10
Repositories, issues, pull requests, commits and files on either provider.
Cloudflare 37
Zones, DNS, KV, R2, Pages, Workers, rulesets and cache — thirty-seven operations.
Netlify 17
Sites, deploys, builds, environment variables, DNS zones and form submissions on the user's own Netlify account.
Mock 1
Execute a mock definition and get a deterministic answer for tests and demos.
Ecosystem export 1
Generate native community node packages for n8n and Make from any set of endpoints.
Custom endpoints 4
Upload JavaScript, get a URL. Runs in an isolated V8 sandbox, billed from the same wallet.
Account & wallet 0
Keys, wallet balance and ledger, analytics, affiliates, health.
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