https://apimark.dev/guides/Practical guides on APIs and MCP servershttps://apimark.dev/guides/what-is-mcp/https://apimark.dev/guides/what-is-mcp/Sat, 31 Oct 2026 00:00:00 GMTMCP explained without hype: what servers, clients and tools are, local vs remote servers, and how to pick one safely.https://apimark.dev/guides/how-to-choose-an-api/https://apimark.dev/guides/how-to-choose-an-api/Sat, 31 Oct 2026 00:00:00 GMTBefore you build on someone else's API, check these twelve things: pricing, limits, reliability, data rights and exit costs.https://apimark.dev/guides/cron-syntax-cheat-sheet/https://apimark.dev/guides/cron-syntax-cheat-sheet/Sat, 31 Oct 2026 00:00:00 GMTA no-nonsense cron reference: the five fields, special characters, macros, 25 copy-paste schedules and common pitfalls.https://apimark.dev/guides/volumetric-weight-explained/https://apimark.dev/guides/volumetric-weight-explained/Sat, 31 Oct 2026 00:00:00 GMTWhy a big light box costs more than a small heavy one, the divisors carriers use, and five ways to cut shipping costs.https://apimark.dev/guides/api-pricing-models/https://apimark.dev/guides/api-pricing-models/Sat, 31 Oct 2026 00:00:00 GMTHow API providers price access, what each model means for your costs, and how to forecast an API bill.https://apimark.dev/guides/free-public-apis-for-side-projects/https://apimark.dev/guides/free-public-apis-for-side-projects/Sat, 31 Oct 2026 00:00:00 GMTHand-picked free APIs, many needing no key, for weather, maps, books, space, food, holidays and more, with project ideas.https://apimark.dev/guides/webhook-signature-verification/https://apimark.dev/guides/webhook-signature-verification/Sat, 31 Oct 2026 00:00:00 GMTHow webhooks work, why you must verify signatures, a correct HMAC check in Node.js and Python, and how to handle retries safely.https://apimark.dev/guides/api-key-security/https://apimark.dev/guides/api-key-security/Sat, 31 Oct 2026 00:00:00 GMTWhere API keys leak, how attackers find them within minutes, and ten practical rules for storing, scoping and rotating keys.https://apimark.dev/guides/rate-limits-retries-backoff/https://apimark.dev/guides/rate-limits-retries-backoff/Sat, 31 Oct 2026 00:00:00 GMTHow API rate limits work, which errors to retry, exponential backoff with jitter, and copy-paste retry code for JavaScript and Python.https://apimark.dev/guides/rest-vs-graphql-vs-grpc/https://apimark.dev/guides/rest-vs-graphql-vs-grpc/Sat, 31 Oct 2026 00:00:00 GMTA balanced comparison of REST, GraphQL and gRPC (plus webhooks and MCP), with a decision guide for real projects.