Vercel 4.5MB Serverless Function Payload Limit (HTTP 413)

Vercel serverless functions reject HTTP request/response bodies > 4.5 MB.

1. Immediate Code & SKU Fix

Replace With SKU: r2 presigned direct upload (@aws-sdk/s3-request-presigner)

Install Command: npm install @aws-sdk/client-s3 @aws-sdk/s3-request-presigner

Required Env Vars: CF_ACCOUNT_ID, R2_ACCESS_KEY_ID, R2_SECRET_ACCESS_KEY

// Generate an R2 presigned PUT URL and upload large files directly to Cloudflare R2 ($0 egress); pass only the object key to your API route.

2. Verified Hot-Swap Fallback Route

Primary: r2 → Fallback: s3

liveHealth: operational · autoActOk: false

Deep AWS estate / S3-only features — S3

Matched Error String Signatures (5)

vercel 4.5mb payload limit4.5mbfunction_payload_too_large413request entity too large

curl -s "https://getagentdepot.com/api/rescue?q=vercel%204.5mb%20payload%20limit"

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