Agent skill
aws-sigv4-req-builder
Generate Python code to call undocumented AWS APIs using SigV4 authentication from cURL requests captured in browser dev tools. This skill should be used when users need to create Python functions that call AWS internal or undocumented APIs with proper AWS Signature Version 4 authentication.
Install this agent skill to your Project
npx add-skill https://github.com/majiayu000/claude-skill-registry/tree/main/skills/other/aws-sigv4-req-builder-discretetom-aws-sigv4-req-builde
SKILL.md
AWS SigV4 Request Builder
Generate Python code to call undocumented AWS APIs using AWS Signature Version 4 authentication from cURL requests.
When to Use
Use this skill when users need to:
- Call undocumented AWS APIs from Python
- Convert browser network requests to authenticated Python code
- Build API clients for AWS services without official SDK support
How to Use
Step 1: Get cURL from User
Ask the user for the cURL command (from browser dev tools: Network tab → Right-click → Copy as cURL).
Step 2: Extract Information
From the cURL command, extract:
- URL: Full endpoint URL
- Region: Extract from URL (e.g.,
us-east-1fromservice.us-east-1.amazonaws.com) - Service name: Extract from authorization header SignedHeaders or URL (e.g.,
/us-east-1/q/aws4_request→ "q") - Operation name: Extract from
x-amz-targetheader (part after the dot, e.g.,CreateAssignmentfromAmazonQDeveloperService.CreateAssignment) - Function name: Convert operation name to snake_case (e.g.,
CreateAssignment→create_assignment) - HTTP method: From
-Xflag or default to POST if--datapresent - Headers: Content-Type and x-amz-target (exclude authorization, cookie, user-agent, sec-*, origin, referer, priority)
- Payload: From
--data-rawor--data - Parameters: Extract keys from JSON payload
Step 3: Generate Python Code
Create a Python function following this pattern:
import boto3
import json
from botocore.awsrequest import AWSRequest
from botocore.auth import SigV4Auth
import requests
def function_name(param1, param2):
"""Call AWS API with description"""
session = boto3.Session()
credentials = session.get_credentials()
payload = {
"key1": param1,
"key2": param2
}
request = AWSRequest(
method="POST",
url="https://service.region.amazonaws.com/",
data=json.dumps(payload),
headers={
"Content-Type": "application/x-amz-json-1.0",
"x-amz-target": "ServiceName.OperationName",
},
)
SigV4Auth(credentials, "service-name", "region").add_auth(request)
response = requests.post(request.url, headers=dict(request.headers), data=request.body)
return response
Example
User provides cURL:
curl 'https://codewhisperer.us-east-1.amazonaws.com/' \
-H 'authorization: AWS4-HMAC-SHA256 Credential=.../us-east-1/q/aws4_request, ...' \
-H 'content-type: application/x-amz-json-1.0' \
-H 'x-amz-target: AmazonQDeveloperService.CreateAssignment' \
--data-raw '{"principalId":"123","principalType":"USER","subscriptionType":"Q_DEVELOPER_STANDALONE_PRO"}'
Auto-extracted:
- Service: "q" (from authorization header:
/us-east-1/q/aws4_request) - Region: "us-east-1" (from URL)
- Operation: "CreateAssignment" (from x-amz-target)
- Function name: "create_assignment" (snake_case of operation)
- Parameters: principalId, principalType, subscriptionType (from payload)
Generated code:
import boto3
import json
from botocore.awsrequest import AWSRequest
from botocore.auth import SigV4Auth
import requests
def create_assignment(principal_id, principal_type="USER", subscription_type="Q_DEVELOPER_STANDALONE_PRO"):
"""Create Q Developer subscription assignment"""
session = boto3.Session()
credentials = session.get_credentials()
payload = {
"principalId": principal_id,
"principalType": principal_type,
"subscriptionType": subscription_type
}
request = AWSRequest(
method="POST",
url="https://codewhisperer.us-east-1.amazonaws.com/",
data=json.dumps(payload),
headers={
"Content-Type": "application/x-amz-json-1.0",
"x-amz-target": "AmazonQDeveloperService.CreateAssignment",
},
)
SigV4Auth(credentials, "q", "us-east-1").add_auth(request)
response = requests.post(request.url, headers=dict(request.headers), data=request.body)
return response
Prerequisites
Generated code requires:
- Python 3.6+
- boto3:
pip install boto3 - requests:
pip install requests - AWS credentials configured
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