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POST
/
builds
/
upload-url
Get upload URL for build context
curl --request POST \
  --url https://api.pipecat.daily.co/v1/builds/upload-url \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "region": "us-west"
}
'
{
  "uploadId": "550e8400-e29b-41d4-a716-446655440000",
  "uploadUrl": "https://daily-co-pcc-build-context.s3.amazonaws.com",
  "uploadFields": {
    "key": "org-123/550e8400-e29b-41d4-a716-446655440000.tar.gz",
    "bucket": "daily-co-pcc-build-context-qa-us-west-2",
    "Content-Type": "application/gzip",
    "Policy": "eyJleHBpcmF0aW9uIjoi...",
    "X-Amz-Algorithm": "AWS4-HMAC-SHA256",
    "X-Amz-Credential": "ASIA.../us-west-2/s3/aws4_request",
    "X-Amz-Date": "20260220T120000Z",
    "X-Amz-Security-Token": "FwoGZXIvYXdzE...",
    "X-Amz-Signature": "abc123..."
  },
  "expiresAt": "2026-02-20T12:15:00.000Z"
}

​
Uploading Your Context

After receiving the upload URL and fields, upload your context archive using a multipart form POST request: 
# Get the upload URL
RESPONSE=$(curl -s -X POST "https://api.pipecat.daily.co/v1/builds/upload-url" \
  -H "Authorization: Bearer $PIPECAT_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"region": "us-west"}')

# Extract fields from response
UPLOAD_URL=$(echo $RESPONSE | jq -r '.uploadUrl')
UPLOAD_ID=$(echo $RESPONSE | jq -r '.uploadId')

# Upload the context archive (must be gzipped tar)
# Note: Field names are case-sensitive (X-Amz-*, not x-amz-*)
curl -X POST "$UPLOAD_URL" \
  -F "key=$(echo $RESPONSE | jq -r '.uploadFields.key')" \
  -F "bucket=$(echo $RESPONSE | jq -r '.uploadFields.bucket')" \
  -F "Content-Type=application/gzip" \
  -F "Policy=$(echo $RESPONSE | jq -r '.uploadFields.Policy')" \
  -F "X-Amz-Algorithm=$(echo $RESPONSE | jq -r '.uploadFields[\"X-Amz-Algorithm\"]')" \
  -F "X-Amz-Credential=$(echo $RESPONSE | jq -r '.uploadFields[\"X-Amz-Credential\"]')" \
  -F "X-Amz-Date=$(echo $RESPONSE | jq -r '.uploadFields[\"X-Amz-Date\"]')" \
  -F "X-Amz-Security-Token=$(echo $RESPONSE | jq -r '.uploadFields[\"X-Amz-Security-Token\"]')" \
  -F "X-Amz-Signature=$(echo $RESPONSE | jq -r '.uploadFields[\"X-Amz-Signature\"]')" \
  -F "file=@context.tar.gz"

echo "Upload ID: $UPLOAD_ID"
The context archive must be a gzipped tar file (.tar.gz). The upload URL validates both the content type and file size.
Field names are case-sensitive. When uploading to S3, you must use the exact field names returned in uploadFields (e.g., X-Amz-Algorithm, not x-amz-algorithm). Using incorrect casing will result in authentication errors.

​
Creating the Context Archive

Your context archive should contain your Dockerfile and all files needed for the build: 
# Create a tar.gz of your project
tar -czvf context.tar.gz \
  --exclude='.git' \
  --exclude='node_modules' \
  --exclude='__pycache__' \
  --exclude='.venv' \
  .
The maximum context size is 500MB. Use a .dockerignore file to exclude unnecessary files and keep your context small for faster uploads and builds.

Authorizations

​
Authorization
string
header
required

Authentication using a Pipecat Cloud API token.

Body

application/json
​
region
string
required

Target region for the build. Must be a region where cloud builds are enabled.

Example:

"us-west"

Response

Upload URL generated successfully

​
uploadId
string<uuid>

Unique identifier for this upload. Use this when creating the build.

Example:

"550e8400-e29b-41d4-a716-446655440000"

​
uploadUrl
string<uri>

Pre-signed URL to upload your context archive. Use HTTP POST with form-data.

Example:

"https://daily-co-pcc-build-context.s3.amazonaws.com"

​
uploadFields
object

Form fields that must be included when uploading to the pre-signed URL.

Example:
{
  "key": "org-123/550e8400-e29b-41d4-a716-446655440000.tar.gz",
  "bucket": "daily-co-pcc-build-context-qa-us-west-2",
  "Content-Type": "application/gzip",
  "Policy": "eyJleHBpcmF0aW9uIjoi...",
  "X-Amz-Algorithm": "AWS4-HMAC-SHA256",
  "X-Amz-Credential": "ASIA.../us-west-2/s3/aws4_request",
  "X-Amz-Date": "20260220T120000Z",
  "X-Amz-Security-Token": "FwoGZXIvYXdzE...",
  "X-Amz-Signature": "abc123..."
}
​
expiresAt
string<date-time>

When the upload URL expires. Upload must complete before this time.

Example:

"2026-02-20T12:15:00.000Z"