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The Internet Archive is now rate-limiting the Wayback Machine against high-volume automated traffic
A 15 September post says the Archive has put protective measures in place against waves of high-volume automated traffic and rewrote the error text that blocked requests receive, which now surfaces as HTTP 429. The post gives no rate limits, no API changes and no documented access pattern for developers, only an admission that the filters sometimes catch real people and an address ([redacted]) to mail with your OS, browser and IP if you are blocked in error. Anyone with tooling that reads Wayback snapshots at volume should expect intermittent 429s with no published budget to code against.
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