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Migration Impact
x402
Migration Impact is a paid API for AI agents from api.zfinia.com, paid per call via x402, $0.22/call, status unknown (last checked 2026-10-11).
Analyzes a JSON schema change and real payload samples to determine compatibility verdict and how many payloads would be rejected by the new schema, ranked by failing constraints.
Price / call$0.22
Success—
StatusUnknown
How this service works
Decide whether a schema change is safe to ship, with evidence. Returns the compatibility verdict for your clients and, separately, how many of the real payloads you supply would newly be rejected, with the failing constraints ranked by how many payloads each costs. A breaking change nothing relies on is a different decision from one that rejects a tenth of your traffic.
Output
Returns a compatibility verdict indicating whether the schema change is breaking for producers, consumers, or both, along with a count of how many supplied sample payloads would be rejected under the new schema, and a ranked list of the specific failing constraints ordered by how many payloads each constraint rejects.
Example use cases
Pre-deploy schema compatibility check
“We're adding three new required fields to our event schema. Here's the old schema, the new one, and 300 real event payloads from the past week — check if this is a breaking change for consumers and tell me how many of those payloads would be rejected and why.”
Ranking which constraint breaks the most traffic
“I made a schema change that tightens validation on our API — before I ship it, run it against these 500 sample payloads from our prod logs and tell me which specific constraints are rejecting the most payloads, ranked from worst to best.”
Evaluating a safe-looking schema tightening
“Our team wants to add an enum restriction to a field that currently accepts any string. Here's the before and after schema — can you check this change from both producer and consumer perspective and tell me how many of our actual payloads would fail with the new rule?”
Technical details
Endpoint
POSThttps://api.zfinia.com/x402/v1/json-schema-migration-impact?utm_source=zero.xyzWhen to prefer
Use this endpoint when you need evidence-based confidence before shipping a schema change — specifically when you have real payload samples and want to know both the compatibility verdict and the quantified impact on actual traffic. It goes beyond static schema diffing by running your real documents against the new schema, so it distinguishes a breaking change that affects zero current payloads from one that would reject 10% of your traffic. Prefer it over generic JSON Schema validators when migration risk quantification matters.
Side effects
- documents array empty or missing — requires at least 1 sample payload
- before or after schema malformed — invalid JSON Schema object causes error
- documents array exceeds 500 item limit — request rejected
- role enum value not one of producers, consumers, both — validation error
- schema objects reference external $refs that cannot be resolved — constraint analysis incomplete
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| role | string | |
| after | object | |
| before | object | |
| documents | array |
Tags
x402
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