the server responded with status 400 (Faraday::BadRequestError) with Gemini API key

[palladius]

Hi, I'm trying to use nanobots with Gemini API key and keep failing repeatedly. after some debugging, I can see that gemini-ai and curl work great with my API key, while nb fails to work.

For convenience the code is all here: https://github.com/palladius/ragazzi

# .env file has this 
export GOOGLE_API_KEY='blah blah blah'

# gemini-api-cartridge.yaml
---
meta:
  symbol: 🤖
  name: Nano Bot Name
  author: Your Name
  version: 1.0.0
  license: CC0-1.0
  description: A helpful assistant.

behaviors:
  interaction:
    directive: You are a helpful assistant.

provider:
  id: google
  credentials:
    service: generative-language-api
    api-key: ENV/GOOGLE_API_KEY
  options:
    model: gemini-pro

$ nb gemini-api-cartridge.yaml - eval "Hello" 
/usr/local/google/home/ricc/.rbenv/versions/3.2.1/lib/ruby/gems/3.2.0/gems/faraday-2.9.1/lib/faraday/response/raise_error.rb:16:in `on_complete': the server responded with status 400 (Faraday::BadRequestError)
        from /usr/local/google/home/ricc/.rbenv/versions/3.2.1/lib/ruby/gems/3.2.0/gems/faraday-2.9.1/lib/faraday/middleware.rb:18:in `block in call'
        from /usr/local/google/home/ricc/.rbenv/versions/3.2.1/lib/ruby/gems/3.2.0/gems/faraday-2.9.1/lib/faraday/response.rb:42:in `on_complete'
        from /usr/local/google/home/ricc/.rbenv/versions/3.2.1/lib/ruby/gems/3.2.0/gems/faraday-2.9.1/lib/faraday/middleware.rb:17:in `call'
        from /usr/local/google/home/ricc/.rbenv/versions/3.2.1/lib/ruby/gems/3.2.0/gems/faraday-2.9.1/lib/faraday/rack_builder.rb:152:in `build_response'
        from /usr/local/google/home/ricc/.rbenv/versions/3.2.1/lib/ruby/gems/3.2.0/gems/faraday-2.9.1/lib/faraday/connection.rb:444:in `run_request'
        from /usr/local/google/home/ricc/.rbenv/versions/3.2.1/lib/ruby/gems/3.2.0/gems/faraday-2.9.1/lib/faraday/connection.rb:280:in `post'
        from /usr/local/google/home/ricc/.rbenv/versions/3.2.1/lib/ruby/gems/3.2.0/gems/gemini-ai-4.0.0/controllers/client.rb:150:in `request'
        from /usr/local/google/home/ricc/.rbenv/versions/3.2.1/lib/ruby/gems/3.2.0/gems/gemini-ai-4.0.0/controllers/client.rb:101:in `stream_generate_content'
        from /usr/local/google/home/ricc/.rbenv/versions/3.2.1/lib/ruby/gems/3.2.0/gems/nano-bots-3.1.0/components/providers/google.rb:152:in `evaluate'
        from /usr/local/google/home/ricc/.rbenv/versions/3.2.1/lib/ruby/gems/3.2.0/gems/nano-bots-3.1.0/controllers/session.rb:131:in `process_interaction'
        from /usr/local/google/home/ricc/.rbenv/versions/3.2.1/lib/ruby/gems/3.2.0/gems/nano-bots-3.1.0/controllers/session.rb:107:in `process'
        from /usr/local/google/home/ricc/.rbenv/versions/3.2.1/lib/ruby/gems/3.2.0/gems/nano-bots-3.1.0/controllers/session.rb:93:in `evaluate_and_print'
        from /usr/local/google/home/ricc/.rbenv/versions/3.2.1/lib/ruby/gems/3.2.0/gems/nano-bots-3.1.0/controllers/interfaces/eval.rb:15:in `evaluate'
        from /usr/local/google/home/ricc/.rbenv/versions/3.2.1/lib/ruby/gems/3.2.0/gems/nano-bots-3.1.0/controllers/instance.rb:52:in `eval'
        from /usr/local/google/home/ricc/.rbenv/versions/3.2.1/lib/ruby/gems/3.2.0/gems/nano-bots-3.1.0/controllers/interfaces/cli.rb:80:in `handle!'
        from /usr/local/google/home/ricc/.rbenv/versions/3.2.1/lib/ruby/gems/3.2.0/gems/nano-bots-3.1.0/ports/dsl/nano-bots.rb:32:in `cli'
        from /usr/local/google/home/ricc/.rbenv/versions/3.2.1/lib/ruby/gems/3.2.0/gems/nano-bots-3.1.0/ports/dsl/nano-bots/cli.rb:5:in `<top (required)>'
        from <internal:/usr/local/google/home/ricc/.rbenv/versions/3.2.1/lib/ruby/3.2.0/rubygems/core_ext/kernel_require.rb>:88:in `require'
        from <internal:/usr/local/google/home/ricc/.rbenv/versions/3.2.1/lib/ruby/3.2.0/rubygems/core_ext/kernel_require.rb>:88:in `require'
        from /usr/local/google/home/ricc/.rbenv/versions/3.2.1/lib/ruby/gems/3.2.0/gems/nano-bots-3.1.0/bin/nb:4:in `<top (required)>'
        from /usr/local/google/home/ricc/.rbenv/versions/3.2.1/bin/nb:25:in `load'
        from /usr/local/google/home/ricc/.rbenv/versions/3.2.1/bin/nb:25:in `<main>'

I thought I might have a bad key, but then I tried this with same key and that worked:

require 'gemini-ai'

client = Gemini.new(
  credentials: {
    service: 'generative-language-api',
    api_key: ENV['GOOGLE_API_KEY'],
    version: 'v1beta'
  },
  options: {
    model: 'gemini-pro',
    server_sent_events: true }
)

client.stream_generate_content(
  { contents: {
    role: 'user',
    parts: { text: 'hi!' } } }
) do |event, parsed, raw|
  puts event
end

==>

{"candidates"=>[{"content"=>{"parts"=>[{"text"=>"Hello! How can I assist you today?"}], "role"=>"model"}, "finishReason"=>"STOP", "index"=>0, "safetyRatings"=>[{"category"=>"HARM_CATEGORY_SEXUALLY_EXPLICIT", "probability"=>"NEGLIGIBLE"}, {"category"=>"HARM_CATEGORY_HATE_SPEECH", "probability"=>"NEGLIGIBLE"}, {"category"=>"HARM_CATEGORY_HARASSMENT", "probability"=>"NEGLIGIBLE"}, {"category"=>"HARM_CATEGORY_DANGEROUS_CONTENT", "probability"=>"NEGLIGIBLE"}]}], "usageMetadata"=>{"promptTokenCount"=>3, "candidatesTokenCount"=>9, "totalTokenCount"=>12}}

Please help

$ ruby -v
ruby 3.2.1 (2023-02-08 revision 31819e82c8) [x86_64-linux]

$ cat Gemfile
source "https://rubygems.org"

gem 'nano-bots', '~> 3.1.0'
gem 'gemini-ai', '~> 4.0.0'

[palladius]

I'm happy to troubleshoot and file a PR myself, I just need help on how to enable Faraday logging (to see what API call is being made and what JSON is being returned).

[palladius]

This is the faraday dump. Seems like NO response body is available, just a "mute" 400.
Note I'm based in Switzerland, and recently Gemini API KEYs have been made available in most of Europe. Weird it works from curl and not from this gem.

#<struct Faraday::Env
 method=:post,
 request_body=
  "{\"contents\":[{\"role\":\"user\",\"parts\":{\"text\":\"Write a story about a magic backpack\"}}],\"generationConfig\":{\"candidateCount\":1},\"system_instruction\":{\"role\":\"user\",\"parts\":{\"text\":\"You are a helpful assistant from Google, called RAGazzo.\\nMake sure to always introduce yourself in interactions with humans.\\n\"}}}",
 url=
  #<URI::HTTPS https://generativelanguage.googleapis.com/v1/models/gemini-pro:streamGenerateContent?alt=sse&key=REDACTED>,
 request=
  #<struct Faraday::RequestOptions
   params_encoder=nil,
   proxy=nil,
   bind=nil,
   timeout=nil,
   open_timeout=nil,
   read_timeout=nil,
   write_timeout=nil,
   boundary=nil,
   oauth=nil,
   context=nil,
   on_data=
    #<Proc:0x0000000106e03358 /Users/ricc/.rbenv/versions/3.1.2/lib/ruby/gems/3.1.0/gems/gemini-ai-4.0.0/controllers/client.rb:164>>,
 request_headers=
  {"User-Agent"=>"Faraday v2.9.1", "Content-Type"=>"application/json"},
 ssl=
  #<struct Faraday::SSLOptions
   verify=true,
   verify_hostname=nil,
   ca_file=nil,
   ca_path=nil,
   verify_mode=nil,
   cert_store=nil,
   client_cert=nil,
   client_key=nil,
   certificate=nil,
   private_key=nil,
   verify_depth=nil,
   version=nil,
   min_version=nil,
   max_version=nil>,
 parallel_manager=nil,
 params=nil,
 response=
  #<Faraday::Response:0x0000000106df2238
   @env=#<struct Faraday::Env:...>,
   @on_complete_callbacks=[]>,
 response_headers=
  {"vary"=>"Origin, X-Origin, Referer",
   "content-type"=>"text/event-stream",
   "date"=>"Tue, 18 Jun 2024 06:19:46 GMT",
   "server"=>"scaffolding on HTTPServer2",
   "content-length"=>"457",
   "x-xss-protection"=>"0",
   "x-frame-options"=>"SAMEORIGIN",
   "x-content-type-options"=>"nosniff",
   "server-timing"=>"gfet4t7; dur=817",
   "alt-svc"=>"h3=\":443\"; ma=2592000,h3-29=\":443\"; ma=2592000"},
 status=400,
 reason_phrase="",
 response_body="">

[icebaker]

Hi @palladius! Thank you very much for reporting the issue. I identified the root cause and I'm working on a fix in this PR:

• Fixing Gemini system instructions #22.

[icebaker]

@palladius fixed in version 3.2.0:

gem 'nano-bots', '~> 3.2'

Update:

Actually, prefer the newer version 3.4.0:

gem 'nano-bots', '~> 3.4'

[palladius]

You are a STAR!
I've updated the dependency and now it works like a charm!

I took a look at #22 . Nice job!