Reliable JSON for AI agents

Agents frequently return malformed JSON.

Deterministic inspect, safe repair, and JSON Schema validation. No LLM. No invented values.

• Free: MCP + inspect + validate + repair
• Paid: POST /v1/json/reliable — 0.003 USDC per call via x402 on Base

Before: {'name': 'agent',} (single quotes, trailing comma)

After: {"name": "agent"} — only if the repair is structurally safe. Missing semantic values are never invented.

Primary: POST https://agent-json-reliability.onrender.com/v1/json/reliable

Agent Utility Store

Pay-per-call utilities for agents. Base USDC via x402. No subscription.

JSON

• JSON Reliability — Inspect, safe repair, and JSON Schema validation. (0.003 USDC, POST /v1/json/reliable)
• JSON Contract Check — Validate a document against JSON Schema with missing/extra key diagnostics. (0.003 USDC, POST /v1/json/contract-check)
• JSON Structural Diff — Diff two JSON documents by keys, types, and values. (0.003 USDC, POST /v1/json/diff)

Web

• Web Structured Extract — Extract title, headings, main text, and metadata from a public URL. (0.005 USDC, POST /v1/web/extract)
• Web Clean Markdown — Convert a public page to deterministic Markdown. (0.005 USDC, POST /v1/web/markdown)
• Web Table Extract — Extract HTML tables from a public URL. (0.005 USDC, POST /v1/web/tables)
• Web Metadata Extract — Extract title, canonical, OpenGraph, Twitter, and JSON-LD. (0.003 USDC, POST /v1/web/metadata)
• Web Link Map — Map internal and external links on a public page. (0.003 USDC, POST /v1/web/link-map)

Evidence

• Fresh Web Evidence Pack — Fetch up to 5 public URLs and return facts with provenance and contradictions. (0.0075 USDC, POST /v1/evidence/pack)
• Multi-Source Evidence Compare — Compare 2–5 public sources for agreements and contradictions. (0.01 USDC, POST /v1/evidence/compare)
• Source Contradiction Scan — Group conflicting claims across 2–5 URLs. (0.0075 USDC, POST /v1/evidence/contradictions)
• Freshness Proof — Timestamp, cache headers, and content hash for a public URL. (0.005 USDC, POST /v1/evidence/freshness)
• Content Provenance Receipt — Provenance receipt without storing page body. (0.003 USDC, POST /v1/evidence/receipt)

URL/Security

• Public URL Preflight — TLS, headers, redirects, robots, OpenAPI, sitemap, localhost-leak warnings. (0.005 USDC, POST /v1/url/preflight)
• Security Headers Audit — Audit HSTS, CSP, X-Content-Type-Options, Referrer-Policy, frame protections. (0.003 USDC, POST /v1/url/security-headers)
• CORS Configuration Check — Detect wildcard CORS, credential conflicts, and unsafe combinations. (0.003 USDC, POST /v1/url/cors-check)
• TLS Snapshot — Certificate subject, issuer, expiry, and hostname match. (0.003 USDC, POST /v1/url/tls-check)
• Robots / Agent Access Audit — Check robots.txt, llms.txt, AGENTS.md, sitemap, agent metadata. (0.003 USDC, POST /v1/url/robots-audit)
• Redirect Chain Audit — List redirect hops, downgrades, loops, and final URL. (0.003 USDC, POST /v1/url/redirect-check)

API/OpenAPI

• OpenAPI Production Audit — Audit an OpenAPI document for syntax, servers, security, localhost URLs. (0.005 USDC, POST /v1/api/openapi-audit)
• OpenAPI Breaking Change Diff — Diff two OpenAPI specs for breaking changes. (0.0075 USDC, POST /v1/api/openapi-diff)
• API Schema Drift Check — Compare a live GET/HEAD response shape to a declared schema. (0.005 USDC, POST /v1/api/schema-drift)

MCP/x402

• MCP Production Preflight — initialize + tools/list against a remote MCP URL. Does not execute tools. (0.005 USDC, POST /v1/mcp/preflight)
• x402 Production Preflight — Unpaid 402 probe of a paid endpoint. Never sends PAYMENT-SIGNATURE. (0.0075 USDC, POST /v1/x402/preflight)

Manifest: /.well-known/agent-services.json · OpenAPI: /openapi.json · llms.txt · AGENTS.md · sitemap.xml · /.well-known/agent.json · /.well-known/x402 · /skill.md · /v1/catalog

curl

curl -s -X POST https://agent-json-reliability.onrender.com/v1/json/reliable \
  -H "content-type: application/json" \
  -d '{"text":"{'"'"'a'"'"': 1}"}'

Python

import json, os, urllib.request
BASE = os.environ.get('PUBLIC_BASE_URL', 'https://agent-json-reliability.onrender.com')
req = urllib.request.Request(
    BASE + '/v1/json/reliable',
    data=json.dumps({'text': "{'a': 1}"}).encode(),
    headers={'content-type': 'application/json'},
    method='POST',
)
print(json.load(urllib.request.urlopen(req)))

JavaScript

const BASE = process.env.PUBLIC_BASE_URL || 'https://agent-json-reliability.onrender.com';
const r = await fetch(BASE + '/v1/json/reliable', {
  method: 'POST',
  headers: {'content-type': 'application/json'},
  body: JSON.stringify({text: "{'a': 1}"}),
});
console.log(await r.json());

Optional self-reported source tags (unverified): ?source=github · ?source=x402scan · ?source=community · ?source=showcase · ?source=mcp-registry · ?source=direct