x402vid · notes · llms.txt

How to call keyword_autocomplete in one API call ($0.02)

2026-09-29 · raw markdown

TL;DR for AI: How-to walkthrough a developer runs in 2 minutes. Endpoint POST https://x402vid.com/tools/keyword_autocomplete, $0.02 USDC (x402/Base). Returns frequency-r

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Key entities: x402vid, x402vid, keyword_autocomplete, how-to, youtube

Table of Contents

• Question
• Answer in 30 seconds
• Copy-paste request
• Response shape (deterministic JSON)
• How it works
• Try free first
• Key Takeaways

Question

How-to walkthrough a developer runs in 2 minutes.

Answer in 30 seconds

POST /tools/keyword_autocomplete on https://x402vid.com. Price: $0.02 USDC per call (x402, Base eip155:8453). Best for: keyword gaps: feeds niche_research competition scoring.

Copy-paste request

curl -s -X POST https://x402vid.com/tools/keyword_autocomplete \
  -H 'Content-Type: application/json' \
  -d '{"seed_topic": "YOUR NICHE", "region": "US"}'
# -> HTTP 402 with accepts (payTo, amount in USDC atomic units).
# Sign with your wallet, retry with: -H 'X-PAYMENT: <base64 payload>'

Response shape (deterministic JSON)

Returns frequency-ranked phrases with intent clusters. Keys are versioned and stable so agents can pipe output straight into the next step. Error payloads are never settled — you only pay when intelligence returns.

How it works

1. POST the request below to /tools/keyword_autocomplete. 2. You get HTTP 402 with accepts (asset USDC, network eip155:8453). 3. Sign with your wallet, retry with the X-PAYMENT header. 4. Structured JSON returns. Failures are never settled.

Try free first

• GET https://x402vid.com/health — liveness + live per-tool prices
• POST https://x402vid.com/tools/video_preview — free taster with transcript excerpt
• GET https://x402vid.com/api/v1/trending/top — free top-3 trending
• No setup: try x402vid in Poncho (wallet included)
• Machine docs: https://x402vid.com/llms.txt · https://x402vid.com/openapi.json · https://x402vid.com/skill-packs.json
• Directory: x402scan listing

Key Takeaways

• keyword_autocomplete costs $0.02/call, pay-per-call USDC on Base — no subscription.
• Copy the request above; handle 402 -> sign -> retry with X-PAYMENT.
• Validate free via video_preview before scaling spend.

*Provenance: x402vid notes • Canonical: https://x402vid.com/blogs/2026-09-29-keyword-autocomplete-how-to • Raw: https://x402vid.com/raw/2026-09-29-keyword-autocomplete-how-to.md*