{ "$schema": "https://top-agent-skills.com/schemas/catalog.v1.json", "type": "primary-category", "slug": "apis-integrations", "title": "APIs & Integrations", "shortTitle": "APIs & Integrations", "description": "REST and GraphQL clients, OAuth flows, webhook receivers, third-party SaaS connectors, rate-limit and retry patterns.", "canonical": "https://top-agent-skills.com/top-skills-for-apis-integrations", "alternates": { "html": "https://top-agent-skills.com/top-skills-for-apis-integrations", "markdown": "https://top-agent-skills.com/top-skills-for-apis-integrations.md", "json": "https://top-agent-skills.com/top-skills-for-apis-integrations.json" }, "rubricVersion": "1.0", "methodology": "https://top-agent-skills.com/about/methodology", "contentLastUpdated": "2026-09-02", "count": 22, "topPick": { "slug": "stripe-best-practices", "name": "stripe-best-practices", "score": 59, "tagline": "Stripe's own integration playbook: pick the right API, set up Connect and billing, and handle keys and webhooks securely.", "url": "https://top-agent-skills.com/skill/stripe-best-practices" }, "ranking": [ { "rank": 1, "slug": "stripe-best-practices", "name": "stripe-best-practices", "score": 59, "tagline": "Stripe's own integration playbook: pick the right API, set up Connect and billing, and handle keys and webhooks securely.", "bestFor": "Building, modifying, or reviewing any Stripe integration — payments, marketplaces, subscriptions, secure key management.", "notIdealFor": "Non-Stripe payment processors (Adyen, Braintree, PayPal) — the rules are Stripe-specific.", "provenance": "verified-org", "publisher": "Stripe", "license": "MIT", "compatibility": [ "claude-code", "cursor", "gemini-cli" ], "install": "/plugin marketplace add stripe/ai", "url": "https://top-agent-skills.com/skill/stripe-best-practices", "json": "https://top-agent-skills.com/skill/stripe-best-practices.json" }, { "rank": 2, "slug": "stripe-projects", "name": "stripe-projects", "score": 59, "tagline": "Provision a Postgres, Redis, auth, or LLM provider through the Stripe Projects catalog rather than signing up by hand.", "bestFor": "Letting an agent provision and wire up cloud services (DB, cache, auth, email, model providers) with credentials returned inline.", "notIdealFor": "Teams that must provision through their own IaC (Terraform, Pulumi) or a locked-down cloud account.", "provenance": "verified-org", "publisher": "Stripe", "license": "MIT", "compatibility": [ "claude-code", "cursor", "gemini-cli" ], "install": "/plugin marketplace add stripe/ai", "url": "https://top-agent-skills.com/skill/stripe-projects", "json": "https://top-agent-skills.com/skill/stripe-projects.json" }, { "rank": 3, "slug": "resend-email", "name": "resend", "score": 59, "tagline": "Resend's own API skill: send transactional and batch email, handle inbound webhooks, and manage domains, templates, and keys.", "bestFor": "Wiring Resend into an app — transactional sends, batch sends, inbound webhook handling, and domain/template/key management.", "notIdealFor": "Non-Resend providers (SendGrid, Postmark, SES) — the SDK calls and webhook signatures are Resend-specific.", "provenance": "verified-org", "publisher": "Resend", "license": "MIT", "compatibility": [ "claude-code", "cursor", "codex" ], "install": "npx skills add resend/resend-skills", "url": "https://top-agent-skills.com/skill/resend-email", "json": "https://top-agent-skills.com/skill/resend-email.json" }, { "rank": 4, "slug": "stripe-connect-recommend", "name": "connect-recommend", "score": 58, "tagline": "The marketplace architecture decision, made with a compatibility matrix that blocks invalid Connect configurations instead of describing them.", "bestFor": "Choosing a Stripe Connect charge pattern and account type before you build — the decision that is expensive to reverse once money is flowing.", "notIdealFor": "Writing the integration. This produces a recommendation document; stripe-payments is the implementation skill once the design is settled.", "provenance": "verified-org", "publisher": "Stripe", "license": "MIT", "compatibility": [ "claude-code" ], "install": "npx skills add stripe/ai --skill connect-recommend", "url": "https://top-agent-skills.com/skill/stripe-connect-recommend", "json": "https://top-agent-skills.com/skill/stripe-connect-recommend.json" }, { "rank": 5, "slug": "stripe-directory", "name": "stripe-directory", "score": 57, "tagline": "Find vendors and partners for a job-to-be-done — and, where supported, let the agent purchase and consume the service.", "bestFor": "Discovering software, service providers, or partners for a vertical or workflow, with optional agent-initiated purchase.", "notIdealFor": "Internal vendor catalogs or procurement that must route through an approved supplier list.", "provenance": "verified-org", "publisher": "Stripe", "license": "MIT", "compatibility": [ "claude-code", "cursor", "gemini-cli" ], "install": "/plugin marketplace add stripe/ai", "url": "https://top-agent-skills.com/skill/stripe-directory", "json": "https://top-agent-skills.com/skill/stripe-directory.json" }, { "rank": 6, "slug": "hookdeck-webhook-skills", "name": "webhook-skills", "score": 56, "tagline": "Hookdeck's webhook playbook: 40 provider-specific skills covering signature verification, idempotency, and event handling — each with runnable examples.", "bestFor": "Building a webhook receiver for a specific provider with correct signature verification, idempotency, and retry handling — the part most teams get subtly wrong.", "notIdealFor": "Outbound API consumption or OAuth flows — this is receiver-side webhook handling, not a general REST client.", "provenance": "verified-org", "publisher": "Hookdeck", "license": "MIT", "compatibility": [ "claude-code", "cursor" ], "install": "npx skills add github.com/hookdeck/webhook-skills --skill stripe-webhooks", "url": "https://top-agent-skills.com/skill/hookdeck-webhook-skills", "json": "https://top-agent-skills.com/skill/hookdeck-webhook-skills.json" }, { "rank": 7, "slug": "composio-tool-router", "name": "composio", "score": 54, "tagline": "Composio's official skill for connecting agents to 1000+ external apps: auth configs, per-user connections, tool execution, and triggers.", "bestFor": "Building a multi-user agent or app that needs per-user OAuth connections to many third-party services (Gmail, Slack, GitHub, Notion) without hand-rolling each integration.", "notIdealFor": "A single, deep integration with one provider — a provider-specific skill (e.g. the Stripe or Twilio skills) gives sharper, vendor-authored guidance than a broad tool router.", "provenance": "verified-org", "publisher": "Composio", "license": "MIT", "compatibility": [ "claude-code", "cursor" ], "install": "npx skills add composiohq/skills", "url": "https://top-agent-skills.com/skill/composio-tool-router", "json": "https://top-agent-skills.com/skill/composio-tool-router.json" }, { "rank": 8, "slug": "workos", "name": "workos", "score": 54, "tagline": "Full-stack WorkOS implementation with auth provider migration paths.", "bestFor": "Adding WorkOS auth to a new app, or migrating from Auth0/Clerk/Cognito/Firebase/Supabase/Stytch/Descope/Better Auth.", "notIdealFor": null, "provenance": "anthropic", "publisher": "Anthropic", "license": "MIT", "compatibility": [ "claude-code", "cursor", "codex", "antigravity" ], "install": "Built into Claude Code. Invoke with /workos.", "url": "https://top-agent-skills.com/skill/workos", "json": "https://top-agent-skills.com/skill/workos.json" }, { "rank": 9, "slug": "workos-widgets", "name": "workos-widgets", "score": 54, "tagline": "Drop-in WorkOS widgets with backend token wiring across every major framework.", "bestFor": "Embedding WorkOS user-management UI in an existing app without rebuilding auth screens.", "notIdealFor": null, "provenance": "anthropic", "publisher": "Anthropic", "license": "MIT", "compatibility": [ "claude-code", "cursor", "codex", "antigravity" ], "install": "Built into Claude Code. Invoke with /workos-widgets.", "url": "https://top-agent-skills.com/skill/workos-widgets", "json": "https://top-agent-skills.com/skill/workos-widgets.json" }, { "rank": 10, "slug": "paddle-agent-skills", "name": "paddle-agent-skills", "score": 53, "tagline": "Paddle's own integration playbook: ten skills for Checkout, webhooks, pricing pages, and subscription lifecycle on the merchant-of-record platform.", "bestFor": "Building or reviewing a Paddle Billing integration — catalog, Checkout, webhooks, customer portal, and subscription upgrade/downgrade/cancel — where Paddle handles payments, tax, and compliance as merchant of record.", "notIdealFor": "Paddle Classic (these skills target Paddle Billing only) and non-Paddle processors such as Stripe or Lemon Squeezy.", "provenance": "verified-org", "publisher": "Paddle", "license": "Apache-2.0", "compatibility": [ "claude-code", "codex", "cursor", "gemini-cli" ], "install": "/plugin marketplace add PaddleHQ/paddle-agent-skills", "url": "https://top-agent-skills.com/skill/paddle-agent-skills", "json": "https://top-agent-skills.com/skill/paddle-agent-skills.json" }, { "rank": 11, "slug": "twilio-skills", "name": "twilio", "score": 53, "tagline": "Twilio's official Developer Kit: 55 skills across SMS, WhatsApp, Voice, Verify, SendGrid, and compliance — plus the Twilio MCP. Public beta.", "bestFor": "Wiring Twilio messaging or voice into an app — SMS/WhatsApp sends, verification flows, and the A2P 10DLC compliance setup most teams skip until it blocks them.", "notIdealFor": "Production-critical work that needs a support SLA — the kit is Public Beta, not covered by Twilio Support Terms or SLA, and some features are unimplemented. For transactional email alone, the focused Resend skill is lighter.", "provenance": "verified-org", "publisher": "Twilio", "license": "MIT", "compatibility": [ "claude-code", "cursor", "codex" ], "install": "/plugin marketplace add twilio/ai", "url": "https://top-agent-skills.com/skill/twilio-skills", "json": "https://top-agent-skills.com/skill/twilio-skills.json" }, { "rank": 12, "slug": "box-for-ai", "name": "box", "score": 53, "tagline": "Box as an agent surface, plus the contract-review workflows nothing else in the catalog covers.", "bestFor": "Teams whose documents already live in Box, especially contract review and diligence over files stored there.", "notIdealFor": "Anyone not on Box — every skill routes through Box auth and its MCP or CLI.", "provenance": "verified-org", "publisher": "Box", "license": "MIT", "compatibility": [ "claude-code" ], "install": "npx skills add box/box-for-ai --skill box", "url": "https://top-agent-skills.com/skill/box-for-ai", "json": "https://top-agent-skills.com/skill/box-for-ai.json" }, { "rank": 13, "slug": "hubspot-agent-skills", "name": "hubspot-agent-skills", "score": 52, "tagline": "First-party HubSpot CRM operations for agents: lookups, deals, quote-to-cash, reporting.", "bestFor": "Teams on HubSpot who want deal management, segment building, and reporting driven from Claude instead of the HubSpot UI.", "notIdealFor": "Anyone not on HubSpot — every skill assumes the hubspot CLI authenticated against your portal.", "provenance": "verified-org", "publisher": "HubSpot", "license": "Apache-2.0", "compatibility": [ "claude-code" ], "install": "npx skills add HubSpot/agent-cli-skills --skill crm-lookup", "url": "https://top-agent-skills.com/skill/hubspot-agent-skills", "json": "https://top-agent-skills.com/skill/hubspot-agent-skills.json" }, { "rank": 14, "slug": "gtm-eng-skills", "name": "gtm-eng-skills", "score": 52, "tagline": "Waterfall enrichment as a procedure, not a single provider call.", "bestFor": "GTM engineers who already know no single data provider covers more than 60-75% of contacts and want the chaining, cost-per-hit ordering and identity validation written down.", "notIdealFor": "Anyone not on Deepline. The skills drive the Deepline CLI and its provider network, so without that account they read as documentation rather than run as workflows.", "provenance": "verified-org", "publisher": "Deepline", "license": "MIT", "compatibility": [ "claude-code" ], "install": "npx skills add getaero-io/gtm-eng-skills --all", "url": "https://top-agent-skills.com/skill/gtm-eng-skills", "json": "https://top-agent-skills.com/skill/gtm-eng-skills.json" }, { "rank": 15, "slug": "slack-block-kit", "name": "block-kit", "score": 51, "tagline": "Slack's own Block Kit skill — and the rare vendor skill that needs no token, because it validates against Slack's public API.", "bestFor": "Composing Slack messages, modals and Home tabs where hand-written Block Kit JSON is the thing that keeps breaking — it validates output against Slack rather than guessing.", "notIdealFor": "Actually sending the message. It generates and validates layouts; delivery is the sibling slack-api skill, which does need a token.", "provenance": "verified-org", "publisher": "Slack Technologies", "license": "MIT", "compatibility": [ "claude-code" ], "install": "/plugin marketplace add slackapi/slack-skills-plugin", "url": "https://top-agent-skills.com/skill/slack-block-kit", "json": "https://top-agent-skills.com/skill/slack-block-kit.json" }, { "rank": 16, "slug": "system-design", "name": "system-design", "score": 51, "tagline": "System design from requirements. APIs, data, boundaries, scale.", "bestFor": "Greenfield service design or designing a new feature that crosses service boundaries.", "notIdealFor": null, "provenance": "anthropic", "publisher": "Anthropic", "license": "MIT", "compatibility": [ "claude-code", "cursor", "codex", "antigravity" ], "install": "claude plugin install engineering", "url": "https://top-agent-skills.com/skill/system-design", "json": "https://top-agent-skills.com/skill/system-design.json" }, { "rank": 17, "slug": "norman-finance", "name": "norman-finance", "score": 49, "tagline": "The ledger, not the checkout: categorise, reconcile, invoice, file.", "bestFor": "Small businesses and freelancers doing their own books who want transaction categorisation, reconciliation and tax preparation driven from the agent.", "notIdealFor": "Anyone outside Germany and the EU. The tax, incorporation and filing skills are Finanzamt-, GmbH/UG-, Gewerbe- and DATEV-specific, so a US bookkeeping workflow gets little from it.", "provenance": "verified-org", "publisher": "Norman Finance", "license": "MIT", "compatibility": [ "claude-code" ], "install": "/plugin marketplace add norman-finance/norman-mcp-server", "url": "https://top-agent-skills.com/skill/norman-finance", "json": "https://top-agent-skills.com/skill/norman-finance.json" }, { "rank": 18, "slug": "zotero-skills", "name": "zotero-skills", "score": 48, "tagline": "Programmatic access to the reference manager academia actually uses.", "bestFor": "Keeping a Zotero library organised and queryable from the agent instead of through the desktop client.", "notIdealFor": "Literature synthesis or writing — this is library operations. Pair it with research-hub or research-co-pilot, both of which sit above it in the workflow.", "provenance": "community", "publisher": "Wenyu Chiou", "license": "MIT", "compatibility": [ "claude-code" ], "install": "npx skills add WenyuChiou/zotero-skills --skill zotero-skills", "url": "https://top-agent-skills.com/skill/zotero-skills", "json": "https://top-agent-skills.com/skill/zotero-skills.json" }, { "rank": 19, "slug": "vibe-prospecting", "name": "vibe-prospecting", "score": 48, "tagline": "The top of the funnel: find the company, find the person, enrich the row.", "bestFor": "Building a targeted lead list or enriching an existing one from natural language — \"SaaS companies in New York using Salesforce, and their engineering leaders\".", "notIdealFor": "Working a pipeline you already have (that is a CRM skill) and any workflow that must run without a paid data account — the skill is the interface, Explorium supplies the data.", "provenance": "verified-org", "publisher": "Explorium", "license": "MIT", "compatibility": [ "claude-code" ], "install": "/plugin install vibe-prospecting@claude-plugins-official", "url": "https://top-agent-skills.com/skill/vibe-prospecting", "json": "https://top-agent-skills.com/skill/vibe-prospecting.json" }, { "rank": 20, "slug": "carta-cap-table", "name": "carta-cap-table", "score": 47, "tagline": "The equity stack: cap table, 409A history, conversions, exit waterfall.", "bestFor": "Founders and finance leads modelling dilution, a new round, or an exit scenario against their real Carta data.", "notIdealFor": "Companies not on Carta, and anything cash-side — this is the equity ledger, not the bank ledger.", "provenance": "verified-org", "publisher": "Carta", "license": "Apache-2.0", "compatibility": [ "claude-code" ], "install": "/plugin marketplace add carta/plugins", "url": "https://top-agent-skills.com/skill/carta-cap-table", "json": "https://top-agent-skills.com/skill/carta-cap-table.json" }, { "rank": 21, "slug": "fhir-developer-skill", "name": "fhir-developer-skill", "score": 44, "tagline": "The standalone FHIR skill: modeling, validation, SMART on FHIR — without the full healthcare plugin.", "bestFor": "Developers building against FHIR who want one lean skill instead of the whole Anthropic healthcare plugin.", "notIdealFor": "Clinical coding or prior-auth workflows — this is developer tooling for the FHIR standard itself.", "provenance": "verified-org", "publisher": "PhenoML", "license": "Apache-2.0", "compatibility": [ "claude-code" ], "install": "/plugin marketplace add PhenoML/ClaudeFHIRSkill", "url": "https://top-agent-skills.com/skill/fhir-developer-skill", "json": "https://top-agent-skills.com/skill/fhir-developer-skill.json" }, { "rank": 22, "slug": "hubspot-admin-skills", "name": "hubspot-admin-skills", "score": 42, "tagline": "A HubSpot admin in a plugin: audits, dedup, scoring, lifecycle hygiene — 37 skills deep.", "bestFor": "RevOps and HubSpot admins doing portal cleanup, data quality, and lifecycle automation work at depth.", "notIdealFor": "One-off CRM lookups — this is an operations toolkit; use hubspot-agent-skills for day-to-day lookups and deals.", "provenance": "community", "publisher": "Tom Granot", "license": "MIT", "compatibility": [ "claude-code" ], "install": "/plugin marketplace add TomGranot/hubspot-admin-skills", "url": "https://top-agent-skills.com/skill/hubspot-admin-skills", "json": "https://top-agent-skills.com/skill/hubspot-admin-skills.json" } ], "faqs": [ { "question": "REST or GraphQL?", "answer": "Skills exist for both. REST clients dominate the long tail; GraphQL Skills tend to focus on Apollo or Relay patterns. Choose based on what the API offers." }, { "question": "How do these Skills handle OAuth?", "answer": "The top Skills implement the full flow — authorization, code exchange, token refresh, secure storage — and handle the common errors (expired tokens, revoked grants, scope mismatch)." }, { "question": "Are webhook idempotency patterns enforced?", "answer": "Yes — the top Skills check event IDs against a processed set with database-level uniqueness, verify signatures before processing, and document the retry behavior." }, { "question": "Do these Skills support typed clients from OpenAPI?", "answer": "Yes — several Skills run openapi-typescript or similar generators and produce a typed client wired into your existing HTTP layer." }, { "question": "How do they handle rate limits?", "answer": "The top Skills read the Retry-After header, implement exponential backoff with jitter, and surface 429 errors clearly. Lower-ranked Skills retry blindly until success or timeout." }, { "question": "Which Skill should I use for which integration job?", "answer": "Match the Skill to the shape of the integration. For a webhook receiver with provider-specific signature verification and idempotency, use Hookdeck's webhook-skills (40 providers, runnable examples). For SMS/WhatsApp/Voice and messaging compliance, use Twilio's official Developer Kit (public beta). For payments, use Stripe's own skills. To connect an agent to many third-party apps with per-user OAuth in one place, use Composio's Tool Router skill. A single deep integration beats a broad tool router; a multi-app agent is the reverse." } ], "license": "https://creativecommons.org/licenses/by/4.0/", "attribution": "Top Agent Skills (https://top-agent-skills.com)" }