{"uid":"cap_O21ArWqqMqE7fJpEhybhD","slug":"delx-json-ld-key-list-21d01e72","name":"Delx JSON-LD Key List","description":"List top-level keys from JSON-LD or JSON objects the caller already holds — call when listing keys from JSON-LD the caller already holds. Use on text/URLs the agent already holds—adjacent to high-volume extract demand, never advertised as general web or X search. Returns deterministic machine-readable JSON for $0.003 USDC via x402 on Base. Execution is first-party, local-only, stateless, and memory-only with no paid upstream, no input retention, and no claim of live chain tip, web search, or me…","url":"https://api.delx.ai/api/v1/x402/jsonld-key-list","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"data":{"type":"object","description":"JSON object or array of objects whose keys will be listed."}}},"responseSchema":{"type":"json","example":{"keys":["@type","name"],"shape":"object","schema":"delx/util-jsonld-key-list/v1","key_count":2}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.003","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.003/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.003","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_yU3xyA7WeVLiCiVmSYT7m","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.003","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Lists all top-level keys from a caller-supplied JSON-LD or plain JSON object without any network access","exampleAgentPrompt":"List all the top-level keys from this JSON-LD object I have: {\"@context\":\"https://schema.org\",\"@type\":\"Person\",\"name\":\"Alice\",\"email\":\"alice@example.com\"}","exampleUseCases":[{"title":"Inspect JSON-LD schema before mapping","prompt":"I've got this JSON-LD document from a knowledge graph and I need to know what top-level keys are present before I try to map it to my schema — can you list all the top-level keys for me? Here's the object: {\"@context\":\"https://schema.org\",\"@type\":\"Product\",\"name\":\"Widget\",\"sku\":\"12345\",\"offers\":{}}"},{"title":"Validate expected fields exist in API response","prompt":"I just received this JSON payload from an API and I need to check what top-level keys it has before I process it — list the keys in this object: {\"id\":\"abc123\",\"status\":\"active\",\"createdAt\":\"2024-01-01\",\"metadata\":{}}"},{"title":"Discover properties in unfamiliar JSON-LD graph","prompt":"Can you enumerate all the top-level property names in this JSON-LD blob so I can understand its structure? Here it is: {\"@context\":{\"@vocab\":\"https://example.org/\"},\"@id\":\"https://example.org/item/1\",\"title\":\"Sample\",\"description\":\"A test item\",\"tags\":[]}"}],"resultDescription":"Returns a deterministic, machine-readable JSON response containing an array of all top-level key names found in the submitted JSON or JSON-LD object, with no side effects, no data retention, and no network calls.","failureModes":["Non-object input (e.g. bare string or number) may return an error or empty key list","Malformed JSON that cannot be parsed will result in a parse error response","Deeply nested structures are not recursed — only top-level keys are returned, which may surprise callers expecting nested key enumeration","Network or payment issues (x402 authorization failure) will prevent execution"],"whenToPreferThis":"Choose this endpoint when you already hold a JSON or JSON-LD object in memory and simply need a deterministic list of its top-level keys — no network fetching, no upstream APIs, no side effects. It is ideal for lightweight schema inspection, field-presence checks, or preparing a mapping step in a data pipeline. Prefer it over general-purpose code execution or LLM-based JSON inspection when you need a cheap ($0.003), fast, reproducible result.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-13T18:55:26.429Z","isFirstParty":false}