{"uid":"cap_a_B1kFg2P98ED2D8HOmom","slug":"json-required-fields-check-57d28020","name":"JSON Required Fields Check","description":"JSON Required Fields Check: JSON Required Fields Check finds absent or null required top-level fields from bounded caller-supplied values without an external provider. Call JSON Required Fields Check before an agent hands structured data or a batch plan to a downstream tool with a stricter contract. Returns the bounded transformation or validation finding with counts, normalized values, and a versioned result contract for JSON Required Fields Check as versioned deterministic JSON. Price: $0.001…","url":"https://api.delx.ai/api/v1/x402/json-required-fields-check","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"object":{"type":"object","description":"Object supplied to JSON Required Fields Check; used only for this bounded calculation and processed in memory without retention.","maxProperties":128,"additionalProperties":true},"required_fields":{"type":"array","items":{"type":"string","maxLength":8192},"maxItems":256,"description":"Required Fields supplied to JSON Required Fields Check; used only for this bounded calculation and processed in memory without retention."}}},"responseSchema":{"type":"json","example":{"result":{"complete":true,"missing_fields":[]},"schema":"delx/util-json-required-fields-check/v1","status":"pass","evidence":{"retained":false,"input_sha256":"3b8f29cd44e029a44371d04cd51467653d8699dd08fc8eb6f9c55cb1aa0707d8","external_calls":0},"operation":"data_batch:json_required_fields_check"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.001","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":"$0.001/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.001","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_Ds7_fEbhVID9qzMBYYleh","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.001","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Validates a JSON object for absent or null required top-level fields, returning counts and normalized findings as versioned deterministic JSON.","exampleAgentPrompt":"Before sending this order payload to the fulfillment API, check it against the required fields [\"order_id\", \"customer_email\", \"items\", \"shipping_address\"] and tell me which ones are missing or null.","exampleUseCases":[{"title":"Preflight check before downstream tool call","prompt":"I'm about to pass this structured result to a payment processor that requires 'amount', 'currency', 'recipient_id', and 'reference' — can you check the object for any missing or null required fields before I send it?"},{"title":"Agent output completeness gate","prompt":"My agent just returned this JSON plan object. Verify that all the required fields — 'task_id', 'assigned_to', 'due_date', 'priority', and 'description' — are present and not null before I hand it off to the task management system."},{"title":"Schema contract enforcement in a pipeline","prompt":"We have a strict contract that every event object must contain 'event_type', 'user_id', 'timestamp', and 'session_id'. Run a required fields check on this batch object and give me the count of missing and null fields."}],"resultDescription":"Returns a versioned deterministic JSON object including: a list of missing fields, a list of null fields, counts of each, normalized values where applicable, and a versioned result contract identifier. No data is retained after processing.","failureModes":["Object exceeds 128 property limit — request rejected","required_fields array exceeds 256 items — request rejected","Malformed input (non-object passed as 'object') — validation error returned","Individual field name string exceeds 8192 characters — item rejected","Network or upstream availability error — HTTP 5xx"],"whenToPreferThis":"Use this endpoint when an AI agent needs a fast, deterministic, in-memory check that a JSON object satisfies a required-field contract before handing it to a stricter downstream tool or API. Prefer it over custom code when you need a versioned, auditable result with field counts rather than a simple boolean, and when you want to avoid retaining sensitive payload data.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T07:11:12.290Z","isFirstParty":false}