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goodsong.dev verify case
https://goodsong.dev/verify/case
answers 402
Verify a legal case citation: does it exist, and does the given case name match the canonical record? Catches a fabricated case citation, including a real-looking citation number paired with an invented case name. Checked against CourtListener. Does not check whether a case is still good law -- no free authoritative source publishes that.
We sent a real
POST request to this endpoint and it
answered 402 with payment requirements we could parse.
- Price
- $0.01
- Network
- base
- Pay to
- 0xf3b36a95913eb2676fcdedb2ba6b0c96ade58de1
- Spec dialect
- v2 (declares x402Version 2)
- Transport
- PAYMENT-REQUIRED header
- HTTP method
- POST
- Response latency
- 235 ms
- Payment options
- 1 usable of 1
- Last checked
- 2026-09-06T01:12:07.813Z (31d ago)
- Category
- identity
Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fgoodsong.dev%2Fverify%2Fcase"