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Browse API Seeker — marketplace listings, docs, guides, tools, and policies. Crawlers should use the XML sitemap and llms.txt for machine-readable discovery.
135+
Pages indexed
11
Sections
apiseeker.com
Domain
SEO
XML sitemap
Machine-readable URL list for Google, Bing, and other crawlers.
OpenCrawl
robots.txt
Crawl rules for search engines and AI bots.
OpenAEO
llms.txt
Structured facts and key URLs for LLM / AEO discovery.
OpenAPI listings
24- Flight Status APILook up flight status by flight number and date.
- GSTIN Verification APIValidate Indian GSTIN numbers and retrieve registered business details.
- Invoice OCR APIExtract line items, totals and tax fields from invoice images and PDFs.
- MD5 GeneratorGenerate MD5 hashes from text.
- SHA-1 GeneratorGenerate SHA-1 hashes from text via a free Host API.
- SHA-256 GeneratorGenerate SHA-256 hashes from text.
- SHA-512 GeneratorGenerate SHA-512 hashes from text.
- UUID GeneratorGenerate RFC 4122 version 4 UUIDs.
- CSS FormatterPretty-print CSS rules.
- CSV to JSONParse CSV text into a JSON array.
Guides
20- GSTIN Verification API: complete guide/guides/gstin-verification-endpoints
- Webhooks for API products/guides/api-webhooks
- API marketplace vs direct provider/guides/marketplace-vs-direct-provider
- OTA API architecture basics/guides/ota-api-architecture
- Flight API pricing explained/guides/flight-api-pricing
- How to choose a flight API/guides/how-to-choose-a-flight-api
- API security basics/guides/api-security-basics
- API observability basics/guides/api-observability
- API caching basics/guides/api-caching-basics
- API error handling/guides/api-error-handling
Use cases
12- GST verification API for vendor onboarding/use-cases/vendor-onboarding
- Invoice OCR API for expense automation/use-cases/expense-automation
- SERP API for SEO monitoring/use-cases/seo-monitoring
- Flight status API for a travel website/use-cases/flight-status-travel-website
- Flight status API for OTAs/use-cases/flight-status-ota
- Flight status API for metasearch/use-cases/flight-status-metasearch
- Pincode API for checkout address forms/use-cases/checkout-address-pincode
- Pincode API for KYC address enrichment/use-cases/kyc-address-enrichment
- Invoice OCR for accounts payable/use-cases/ap-invoice-capture
- SERP API for agency rank reporting/use-cases/agency-rank-reporting
Tools
29- API Response Formatter/tools/api-response-formatter
- Base64 Encoder/tools/base64-encoder
- CSS Formatter/tools/css-formatter
- CSV to JSON/tools/csv-to-json
- HTML Formatter/tools/html-formatter
- HTML to Markdown/tools/html-to-markdown
- IP Address Lookup/tools/ip-lookup
- JavaScript Formatter/tools/js-formatter
- JSON Formatter/tools/json-formatter
- JSON Minifier/tools/json-minifier