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Missing from candidate list despite being a major agent-callable marketplace API. Official Dev MCP covers the API spec only; it does not call the API.","verified":"2026-09-24","operations":["marketplace-listing","store-management","product-search"],"auth_scheme":{"type":"oauth2","in":"header","name":"x-api-key","scheme":"bearer","format":"x-api-key: : plus Authorization: Bearer for OAuth endpoints","source_url":"https://developer.etsy.com/documentation/essentials/authentication","checked_at":"2026-09-24"},"base_url":"https://api.etsy.com/v3","rate_limits":{"summary":"Per API key; current QPS/QPD limits shown in the Developer Portal and response headers (no fixed default published)","source_url":"https://developer.etsy.com/documentation/essentials/rate-limits","checked_at":"2026-09-24"},"oauth_scopes":{"scopes":["listings_r","listings_w","shops_r","shops_w","transactions_r","transactions_w","profile_r","email_r","address_r"],"source_url":"https://developer.etsy.com/documentation/essentials/authentication","checked_at":"2026-09-24"},"no_auth":false,"has_free_tier":true,"has_trial":false,"no_card":false,"stale":false,"link_check":{"checked_at":"2026-09-24","docs":"ok"},"uptime":{"window_days":30,"api":{"url":"https://api.etsy.com/v3","probes":1,"up":1,"median_ms":436,"last":{"at":"2026-09-24T18:26Z","up":true,"detail":404}},"mcp_remote":{"url":"https://mcp.api.etsycloud.com/mcp","probes":1,"up":1,"median_ms":300,"last":{"at":"2026-09-24T18:26Z","up":true,"detail":200}}}}, {"id":"mercado-libre-api","name":"Mercado Libre API","homepage":"https://developers.mercadolibre.com.ar/","docs":"https://developers.mercadolibre.com.ar/en_us/api-docs","auth":"oauth2","auth_hint":"Authorization: Bearer obtained via OAuth 2.0 with the app's Client ID and Secret from DevCenter","mcp":{"type":"none","url":null,"maintainer":"none","source_url":"https://developers.mercadolibre.com.ar/en_us/mcp-server","checked_at":"2026-09-24","domain_verified":null,"kind":"none","config":null},"free_tier":"Free API access for any Mercado Libre account that creates an app in DevCenter; only normal marketplace selling fees apply","sdk":[],"openapi":null,"llms_txt":null,"desc_en":"Lets an agent search items and categories and manage a seller's listings, orders, questions, shipments and promotions on the Mercado Libre marketplace.","notes":"In AR, MX, BR and CL the account holder's details must be validated before creating an app; redirect URI must be HTTPS; rate limited (HTTP 429). Vendor MCP at https://mcp.mercadolibre.com/devsite/v1/mcp only searches the docs.","verified":"2026-09-24","operations":["product-search","marketplace-listing","store-management","shipping"],"auth_scheme":{"type":"oauth2","scheme":"bearer","format":"Authorization: Bearer APP_USR- (token from https://api.mercadolibre.com/oauth/token, valid 6 hours)","source_url":"https://developers.mercadolibre.com.ar/en_us/authentication-and-authorization","checked_at":"2026-09-24"},"base_url":"https://api.mercadolibre.com","no_auth":false,"has_free_tier":true,"has_trial":false,"no_card":false,"stale":false,"uptime":{"window_days":30,"api":{"url":"https://api.mercadolibre.com","probes":1,"up":1,"median_ms":172,"last":{"at":"2026-09-24T18:26Z","up":true,"detail":404}},"mcp_remote":{"url":"https://mcp.mercadolibre.com/devsite/v1/mcp","probes":1,"up":1,"median_ms":260,"last":{"at":"2026-09-24T18:26Z","up":true,"detail":401}}}}, {"id":"printful-api","name":"Printful API","homepage":"https://developers.printful.com","docs":"https://developers.printful.com/docs/","auth":"api_key+oauth2","auth_hint":"Authorization: Bearer (Private token or OAuth2 for public apps)","mcp":{"type":"none","url":null,"domain_verified":null,"kind":"none","config":null},"free_tier":"free API access; pay only for products/fulfillment/shipping ordered","sdk":[],"openapi":"https://developers.printful.com/openapi/","llms_txt":null,"desc_en":"Create print-on-demand products, sync catalogs, and submit fulfillment orders via REST API.","notes":"","verified":"2026-09-24","operations":["store-management","shipping"],"auth_scheme":{"type":"http","scheme":"bearer","format":"Authorization: Bearer (account-level tokens also need X-PF-Store-Id)","source_url":"https://developers.printful.com/docs/","checked_at":"2026-09-24"},"base_url":"https://api.printful.com","rate_limits":{"summary":"120 API calls/min general limit; stricter for mockup generation; 60 s lockout when exceeded","source_url":"https://developers.printful.com/docs/","checked_at":"2026-09-24"},"oauth_scopes":{"scopes":["orders","orders/read","sync_products","sync_products/read","file_library","file_library/read","webhooks","webhooks/read"],"source_url":"https://developers.printful.com/docs/","checked_at":"2026-09-24"},"async_jobs":{"value":true,"how":"mockup generator creates tasks processed asynchronously; poll the task result","source_url":"https://developers.printful.com/docs/"},"no_auth":false,"has_free_tier":true,"has_trial":false,"no_card":false,"stale":false,"link_check":{"checked_at":"2026-09-24","docs":"ok","openapi":"ok"},"ratings":[{"source":"sourceforge","rating":3.0,"reviews":3,"url":"https://sourceforge.net/software/product/Printful/","fetched_at":"2026-09-24T17:01Z"}],"uptime":{"window_days":30,"api":{"url":"https://api.printful.com","probes":1,"up":1,"median_ms":261,"last":{"at":"2026-09-24T18:26Z","up":true,"detail":200}}},"reviews_url":"https://raw.githubusercontent.com/eater2/ai_agents_api_library/main/catalog/reviews/printful-api.json"}, {"id":"shopify-admin-storefront-api","name":"Shopify Admin / Storefront API","homepage":"https://shopify.dev","docs":"https://shopify.dev/docs/api/admin-graphql","auth":"api_key+oauth2","auth_hint":"X-Shopify-Access-Token header (custom app token or OAuth2 for public apps)","mcp":{"type":"official","url":"https://shopify.dev/docs/apps/build/storefront-mcp/servers/storefront","maintainer":"vendor","remote_url":"https://{shop}.myshopify.com/api/mcp","tools":["get_cart","update_cart","search_shop_policies_and_faqs","search_catalog","lookup_catalog","get_product"],"covers_full_api":false,"source_url":"https://shopify.dev/docs/apps/build/storefront-mcp/servers/storefront.md","checked_at":"2026-09-24","domain_verified":false,"kind":"official","config":{"transport":"stdio","command":"npx","args":["-y","@shopify/dev-mcp@latest"],"env":[],"docs_only":true,"source_url":"https://shopify.dev/docs/apps/build/devmcp","checked_at":"2026-09-24"}},"free_tier":"free API access; requires an active paid Shopify store subscription to use","sdk":["node","ruby"],"openapi":null,"llms_txt":null,"desc_en":"Manage products, orders, customers, and inventory (Admin API) or build storefronts (Storefront API) via REST/GraphQL.","notes":"Official Storefront MCP per store (https://{shop}.myshopify.com/api/mcp, no auth) handles cart and policies, catalog tools at /api/ucp/mcp; Admin operations need an Admin API token. 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