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How to use api_transport "REST"? in Agent #1
Description
When authenticating with the Vertex AI API, I typically use api_transport = "rest", which works well with libraries like LangChain or the Vertex AI SDK. However, in my current enterprise environment, gRPC is blocked due to SSL-related issues. I'm now looking for a way to explicitly use REST as the transport method to interact with the Vertex AI API.
I couldn't find anything in the docs. could you please share it.
This is great stuff from google !.
Ex:
from langchain_google_vertexai import ChatVertexAI
llm = ChatVertexAI(
model_name=MODEL_NAME,
project=VERTEX_PROJECT_ID,
location=VERTEX_LOCATION,
temperature=0.0, # Low temp for predictable SQL generation/tool use
# streaming=True, # Enable streaming from the LLM if desired (handled by graph.stream later)
api_transport="rest", # Often default, explicitly set if needed
)
Activity
Jacksunwei commentedon Apr 9, 2025
Hi Natarajan, thanks for reaching out! ADK is indeed using REST to communicate with Model server.
Jacksunwei commentedon Apr 10, 2025
Feel free to reopen if you have more questions.
natarajan0007 commentedon Apr 10, 2025
@Jacksunwei Thanks for letting me know. I have gone through the source code. it looks like you wrote all the client interaction through httpx lib. I would like to know is there way to parse the SSL_CERT_FILE information in the Agent SDK . Do you have an example how to do that?
My Zscaler Inspecting SSL traffic for all the traffic goes to google API . I need to use google pem file. I don't have clue where to call this in Agent SDK. If i figure out i will keep posted here.
google.auth.exceptions.TransportError: HTTPSConnectionPool(host='oauth2.googleapis.com', port=443): Max retries exceeded with url: /token (Caused by SSLError(SSLCertVerificationError(1, '[SSL: CERTIFICATE_VERIFY_FAILED] certificate verify failed: unable to get local issuer certificate (_ssl.c:1000)')))
natarajan0007 commentedon Apr 10, 2025
i found the root cause why SSL Verification failing in enterprise network . Below is the open issue which was raised genai package where its being used in Agent Development Kit
https://github.com/googleapis/python-genai/pull/573/files
natarajan0007 commentedon Apr 10, 2025
After the adding the above PR . My SSL issue is resolved.
just point the below pem file in env
SSL_CERT_FILE= path to pem file.
gcloud.pem
-----BEGIN CERTIFICATE-----
MIIE0zCCA7ugAwIBAgIJANu+mC2Jt3uTMA0GCSqGSIb3DQEBCwUAMIGhMQswCQYD
VQQGEwJVUzETMBEGA1UECBMKQ2FsaWZvcm5pYTERMA8GA1UEBxMIU2FuIEpvc2Ux
FTATBgNVBAoTDFpzY2FsZXIgSW5jLjEVMBMGA1UECxMMWnNjYWxlciBJbmMuMRgw
FgYDVQQDEw9ac2NhbGVyIFJvb3QgQ0ExIjAgBgkqhkiG9w0BCQEWE3N1cHBvcnRA
enNjYWxlci5jb20wHhcNMTQxMjE5MDAyNzU1WhcNNDIwNTA2MDAyNzU1WjCBoTEL
MAkGA1UEBhMCVVMxEzARBgNVBAgTCkNhbGlmb3JuaWExETAPBgNVBAcTCFNhbiBK
b3NlMRUwEwYDVQQKEwxac2NhbGVyIEluYy4xFTATBgNVBAsTDFpzY2FsZXIgSW5j
LjEYMBYGA1UEAxMPWnNjYWxlciBSb290IENBMSIwIAYJKoZIhvcNAQkBFhNzdXBw
b3J0QHpzY2FsZXIuY29tMIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEA
qT7STSxZRTgEFFf6doHajSc1vk5jmzmM6BWuOo044EsaTc9eVEV/HjH/1DWzZtcr
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hp1d3+wcBGnFTpjfMIHWBgNVHSMEgc4wgcuAFLm33UrNww4Mhp1d3+wcBGnFTpjf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-----END CERTIFICATE-----
-----BEGIN CERTIFICATE-----
MIIFWjCCA0KgAwIBAgIQbkepxUtHDA3sM9CJuRz04TANBgkqhkiG9w0BAQwFADBH
MQswCQYDVQQGEwJVUzEiMCAGA1UEChMZR29vZ2xlIFRydXN0IFNlcnZpY2VzIExM
QzEUMBIGA1UEAxMLR1RTIFJvb3QgUjEwHhcNMTYwNjIyMDAwMDAwWhcNMzYwNjIy
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k70paDPvOmbsB4om3xPXV2V4J95eSRQAogB/mqghtqmxlbCluQ0WEdrHbEg8QOB+
DVrNVjzRlwW5y0vtOUucxD/SVRNuJLDWcfr0wbrM7Rv1/oFB2ACYPTrIrnqYNxgF
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HQ4EFgQU5K8rJnEaK0gnhS9SZizv8IkTcT4wDQYJKoZIhvcNAQEMBQADggIBADiW
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XPYfcX3v73svfuo21pdwCxXu11xWajOl40k4DLh9+42FpLFZXvRq4d2h9mREruZR
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F62ARPBopY+Udf90WuioAnwMCeKpSwughQtiue+hMZL77/ZRBIls6Kl0obsXs7X9
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E3PYJ/HQcu51OyLemGhmW/HGY0dVHLqlCFF1pkgl
-----END CERTIFICATE-----
yinghsienwu commentedon Apr 23, 2025
Python-genai merged googleapis/python-genai#573 to resolve the SSL issue in v1.11+.
fix: allows current sub-agent to finish execution before exiting the …
fix: allows current sub-agent to finish execution before exiting the …
fix: allows current sub-agent to finish execution before exiting the …
fix: allows current sub-agent to finish execution before exiting the …
fix: allows current sub-agent to finish execution before exiting the …
fix: allows current sub-agent to finish execution before exiting the …
fix: allows current sub-agent to finish execution before exiting the …
feat: Add deprecation warnings to canonical_*_callbacks properties
refactor: simplify has_callbacks() to use idiomatic Python
Merge pull request google#1 from Px8Studio:dev
Add comprehensive ADK testing compliance report
fix(sessions): text-only loaded history — stop trimming entire turns …
fix: allows current sub-agent to finish execution before exiting the …