square
Accept payments and manage commerce with Square. Use when a user asks to accept in-person and online payments, process credit cards, manage inventory, handle subscriptions, or build a POS integration.
What this skill does
# Square
## Overview
Square handles both online and in-person payments — credit cards, Apple Pay, Google Pay, and POS hardware. APIs cover payments, subscriptions, invoices, catalog, inventory, and customers. Popular for businesses that sell both online and in stores.
## Instructions
### Step 1: Online Payment
```typescript
// lib/square.ts — Process a payment
import { Client, Environment } from 'square'
const client = new Client({
accessToken: process.env.SQUARE_ACCESS_TOKEN!,
environment: Environment.Production,
})
export async function createPayment(amount: number, currency: string, sourceId: string) {
const { result } = await client.paymentsApi.createPayment({
sourceId, // payment token from Web Payments SDK
idempotencyKey: crypto.randomUUID(),
amountMoney: {
amount: BigInt(amount), // in smallest currency unit (cents)
currency,
},
})
return result.payment
}
```
### Step 2: Web Payments SDK (Frontend)
```typescript
// components/SquarePayment.tsx — Payment form
const payments = Square.payments(appId, locationId)
const card = await payments.card()
await card.attach('#card-container')
document.getElementById('pay-btn').addEventListener('click', async () => {
const result = await card.tokenize()
if (result.status === 'OK') {
// Send result.token to your server
await fetch('/api/pay', {
method: 'POST',
body: JSON.stringify({ sourceId: result.token, amount: 2999 }),
})
}
})
```
### Step 3: Catalog and Inventory
```typescript
// Manage products and inventory
const { result } = await client.catalogApi.upsertCatalogObject({
idempotencyKey: crypto.randomUUID(),
object: {
type: 'ITEM',
id: '#coffee-mug',
itemData: {
name: 'Coffee Mug',
variations: [{
type: 'ITEM_VARIATION',
id: '#coffee-mug-regular',
itemVariationData: {
name: 'Regular',
pricingType: 'FIXED_PRICING',
priceMoney: { amount: BigInt(1499), currency: 'USD' },
},
}],
},
},
})
```
## Guidelines
- Square charges 2.9% + $0.30 per online transaction. In-person: 2.6% + $0.10.
- No monthly fees for basic processing. Subscriptions start at $0/month.
- Square is strongest for omnichannel (online + physical store) — synced inventory and customers.
- For online-only SaaS billing, Stripe or Paddle are usually better choices.
Related in General
modeling-omnistudio-epc-catalog
IncludedSalesforce Industries CME EPC product-modeling skill for Product2-based catalog creation. Use when creating EPC products, configuring product attributes, building offer bundles with Product Child Items, or reviewing EPC DataPack JSON metadata for product catalog changes. TRIGGER when: user creates or updates Product2 EPC records, AttributeAssignment payloads, AttributeMetadata/AttributeDefaultValues, Offer bundles, or ProductChildItem relationships. DO NOT TRIGGER when: designing OmniScripts/FlexCards/Integration Procedures (use building-omnistudio-omniscript, building-omnistudio-flexcard, or building-omnistudio-integration-procedure), implementing Apex business logic (use generating-apex), or troubleshooting deployment pipelines (use deploying-metadata).
relationship-science-coach
IncludedUse this skill for direct, practical adult relationship coaching: couples conflict, repair, trust, marriage, dating, flirting, attachment patterns, emotional connection, sex, desire differences, eroticism, kink negotiation, affection, love languages, breakups, and long-term passion. Draw on Gottman, EFT and Hold Me Tight, attachment science, modern sex research, Perel, Nagoski, Kerner, Schnarch, Love and Stosny, and flexible love-language tools. Be concrete and low-hedge. Redirect only for imminent danger, abuse, coercive control, minors, non-consent, self-harm, stalking, or medical/legal/psychiatric decisions.
building-sf-integrations
IncludedSalesforce integration architecture and runtime plumbing with 120-point scoring. Use this skill to set up Named Credentials, External Credentials, External Services, REST/SOAP callout patterns, Platform Events, and Change Data Capture. TRIGGER when: user sets up Named Credentials, External Services, REST/SOAP callouts, Platform Events, CDC, or touches .namedCredential-meta.xml files. DO NOT TRIGGER when: Connected App/OAuth config (use configuring-connected-apps), Apex-only logic (use generating-apex), or data import/export (use handling-sf-data).
venue-templates
IncludedAccess comprehensive LaTeX templates, formatting requirements, and submission guidelines for major scientific publication venues (Nature, Science, PLOS, IEEE, ACM), academic conferences (NeurIPS, ICML, CVPR, CHI), research posters, and grant proposals (NSF, NIH, DOE, DARPA). This skill should be used when preparing manuscripts for journal submission, conference papers, research posters, or grant proposals and need venue-specific formatting requirements and templates.
let-fate-decide
IncludedDraws the 12 Houses of the Zodiac Tarot spread to inject entropy into planning when prompts are vague, ambiguous, or casually delegated. Interprets the spread to guide next steps. Use when the user says 'let fate decide', 'YOLO', 'whatever', 'idk', or other nonchalant phrases, makes Yu-Gi-Oh references, or when you are about to arbitrarily pick between multiple reasonable approaches. Prefer over ask-questions-if-underspecified when the user's tone is casual or playful rather than precision-seeking.
net-ops
IncludedCross-platform network troubleshooting (Windows, macOS, Linux) via local or remote shell. Use for: DNS broken, can't resolve hostnames, nslookup/dig works but apps fail, NRPT, WFP, scutil, /etc/resolver, systemd-resolved, /etc/resolv.conf, NetworkManager, VPN DNS leak residue (ProtonVPN/Mullvad/WireGuard/AnyConnect), AV/firewall blocking DNS or DoH, Tailscale DNS interaction, intermittent connectivity, remote diagnostics over SSH.