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NexusEval Marketing Preflight

https://nexuseval.vercel.app/api/gate
● healthy marketing

Pay-per-use pre-publish marketing QA for ad copy, landing-page copy, lifecycle/promotional email, CTA and GTM messaging. POST JSON with copy required and optional objective, audience, headline and cta; returns structured PASS/WARN/BLOCK-style decision, score, signals, risk flags and recommendations before publication.

Category
marketing
Chains
base
Price
$0.0100 USDC / call

Quality grade

How grading works
B 66.0 / 100
Availability 40.0 / 40
Endpoint responded (HTTP 200)
Payability 20.0 / 20
  • ✓ Answers a real HTTP 402 challenge
  • ✓ Publishes a /.well-known/x402 descriptor
  • ✓ Payment address on record
  • ✓ Settlement network declared
  • ✓ Price declared
Demand 6.0 / 40
1 distinct payers, 9 USDC transfers in the last 30 days
Owner verified 0.0 / 3
Nobody has claimed this listing yet
Endpoint last checked 7 h ago. On-chain activity last read 12 d ago. Availability and on-chain demand are both re-probed daily; the grade updates automatically on the next pass.

Paid endpoints

25 resource(s) advertised by this origin.

POST https://nexuseval.vercel.app/api/procurement-passport/instant

Use before an agent pays an unfamiliar API, MCP server or agent. Returns a machine-readable PASS/WARN/BLOCK procurement preflight, missing-evidence list, risk flags and deterministic evidence hash.

POST https://nexuseval.vercel.app/api/procurement-passport/deep

Use for a deeper autonomous-spend review of an API, MCP server or agent. Returns expanded operational, security, privacy, commercial and continuity evidence scoring with prioritized gaps.

POST https://nexuseval.vercel.app/api/gate

Use immediately before an agent publishes marketing copy. Returns a bounded PASS, WARN, or BLOCK decision with claim-risk flags and prioritized fixes.

POST https://nexuseval.vercel.app/api/evaluate/launch

Use before a multi-asset launch to identify cross-channel inconsistencies, missing evidence, and the highest-priority launch fixes.

POST https://nexuseval.vercel.app/api/evaluate/campaign

Use to audit a campaign portfolio for repeated risks, inconsistent claims, and a prioritized remediation plan.

POST https://nexuseval.vercel.app/api/tools/validators/email

email utility in the NexusEval validators tool family.

POST https://nexuseval.vercel.app/api/tools/validators/url

url utility in the NexusEval validators tool family.

POST https://nexuseval.vercel.app/api/tools/validators/json

json utility in the NexusEval validators tool family.

POST https://nexuseval.vercel.app/api/tools/encoding-hash/sha256

sha256 utility in the NexusEval encoding hash tool family.

POST https://nexuseval.vercel.app/api/tools/encoding-hash/sha512

sha512 utility in the NexusEval encoding hash tool family.

POST https://nexuseval.vercel.app/api/tools/encoding-hash/base64-encode

base64 encode utility in the NexusEval encoding hash tool family.

POST https://nexuseval.vercel.app/api/tools/encoding-hash/base64-decode

base64 decode utility in the NexusEval encoding hash tool family.

POST https://nexuseval.vercel.app/api/v1/chat/completions

OpenAI-compatible chat completions with dynamic per-request x402 pricing, streaming, privacy defaults and cross-provider fallback.

POST https://nexuseval.vercel.app/api/v1/messages

Anthropic-compatible messages with dynamic per-request x402 pricing and streaming.

POST https://nexuseval.vercel.app/api/v1/responses

OpenAI Responses-compatible generation with dynamic per-request x402 pricing and provider fallback.

POST https://nexuseval.vercel.app/api/v1/embeddings

OpenAI-compatible embeddings across the live embedding model catalog.

POST https://nexuseval.vercel.app/api/v1/images/generations

OpenAI-compatible image generation with conservative model-aware dynamic x402 pricing.

POST https://nexuseval.vercel.app/api/v1/audio/speech

Speech generation with model-aware character pricing and x402 settlement.

POST https://nexuseval.vercel.app/api/v2/rerank

Cohere-compatible reranking with bounded request sizes and conservative x402 pricing.

POST https://nexuseval.vercel.app/api/v1/video/generations

Paid video generation with live model-aware pricing.

POST https://nexuseval.vercel.app/api/v1/search

Web research with native search and source-grounded answers.

POST https://nexuseval.vercel.app/api/v1/news

Recent-news research with web search and source grounding.

POST https://nexuseval.vercel.app/api/v1/rpc

Bounded read-only Base, Ethereum and Solana JSON-RPC.

POST https://nexuseval.vercel.app/api/v1/defi

Read-only DeFi protocol data from DefiLlama.

POST https://nexuseval.vercel.app/api/v1/prediction

Read-only Polymarket market discovery and market data.

How to call

cURL · x402-fetch / x402-axios will auto-handle 402
curl -X POST https://nexuseval.vercel.app/api/procurement-passport/instant
/.well-known/x402.json
https://nexuseval.vercel.app/.well-known/x402

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