PrepLayer.ai

Endpoints (13 live)

• POST /v1/validate_json — Deterministic JSON-Schema subset validator. Catches malformed JSON before it breaks a pipeline. Supports: type, required, properties, items, minLength, maxLength, pattern, enum, minimum, maximum, additionalProperties. No external dependencies. (0.003 USDC on Base)
• POST /v1/chunk — Split long text into pieces for RAG retrieval. Strategies: 'sentence' packs whole sentences into a size budget and never splits mid-sentence; 'paragraph' prefers \n\n boundaries; 'fixed' is a hard char window with overlap. The highest-value endpoint for agents that build retrieval pipelines. (0.005 USDC on Base)
• POST /v1/diff — Line-level LCS diff of two text blobs. Returns a structured edit script with insertions, deletions, unchanged line counts and per-operation metadata; with format='unified' also returns a unified-diff string. (0.005 USDC on Base)
• POST /v1/redact — Redact PII from text before it is stored or logged. Returns redacted text plus exact byte spans and counts per class: credit_card, iban, email, private_key, evm_address, phone, ipv4, url. (0.005 USDC on Base)
• POST /v1/extract — Extract structured fields from unstructured text with byte offsets and normalized values: emails, URLs, IPv4, phones, money amounts, ISO dates, UUIDs, EVM addresses, SKUs, semver. (0.005 USDC on Base)
• POST /v1/extract_custom — Pull caller-defined structured fields from text using regex patterns with deterministic type coercion. Supported types: string, bool, date, url, email, number. Returns {fields: {name: value|null}, found, missing}. Pure deterministic — no LLM call. (0.005 USDC on Base)
• POST /v1/validate — Validate and canonicalize one identifier: email, URL, E.164 phone, IBAN (mod-97), payment card (Luhn), UUID, SHA-256, git SHA, EVM address (EIP-55) or domain. Returns {valid, canonical, fingerprint}. (0.002 USDC on Base)
• POST /v1/classify — Rule-based multi-label text classification over a fixed taxonomy (urgency, financial_promise, credential_request, crypto_mention, cta, legal_offer, medical_claim, seo_spam, url_shortener, press_release, question, has_contact). Deterministic - identical text always yields identical labels. (0.003 USDC on Base)
• POST /v1/normalize — Deterministic text normalization: Unicode NFKC, zero-width/bidi stripping, smart-quote and dash folding, whitespace collapse, case folding. Returns a stable content hash so two texts can be compared for exact equality. (0.002 USDC on Base)
• POST /v1/hash — Content-addressable hashing for caching and dedup. Three algorithms: sha256 (via node:crypto / Web Crypto), xxhash64 and murmur3 (inline pure-JS, deterministic across runs). Returns hex digest + algorithm + byte count. (0.002 USDC on Base)
• POST /v1/slugify — URL-safe slug from arbitrary text. NFKD-decomposes unicode (é -> e), lowercases, replaces every non-[a-z0-9] run with a separator, strips leading/trailing separators, truncates on separator boundaries (never mid-word). (0.002 USDC on Base)
• POST /v1/dedupe — Near-duplicate detection across a batch of documents. Exact Jaccard similarity over word-3-shingle sets decides duplication; a 64-bit SimHash is returned per document as a compact content fingerprint. Up to 200 documents per call. (0.01 USDC on Base)
• POST /v1/batch — Run up to 10 primitive calls in one round trip. One x402 payment of $0.02 (=$0.0020 per call) — below the priciest single-call route ($0.01). Each request specifies an `endpoint` (normalize, validate, extract, redact, classify, dedupe, diff, chunk, extract_custom, validate_json, slugify, hash) and the input for it; the response carries the results in the same order. Single-call batch — no streaming. The larger ladder rungs go lower per call: /v1/batch/50 ($0.075, =$0.0015/call) and /v1/batch/100 ($0.100, =$0.0010/call). (0.4 USDC on Base)