freeapis

Dialogflow

Natural Language Processing

Authentication
API Key
HTTPS
Yes
CORS
Unknown

Overview

Dialogflow provides NLU/bots on Google Cloud — key-based (requests need a real GCP project; a bogus one returns 404, verified).

Quick Start

Requires a valid GCP project:

curl -X POST "https://dialogflow.googleapis.com/v2/projects/YOUR_PROJECT/agent/sessions/1:detectIntent" \
  -H "Authorization: Bearer YOUR_TOKEN" \
  -H "Content-Type: application/json" \
  -d '{"queryInput":{"text":{"text":"hello","languageCode":"en"}}}'

Authentication

  • Google Cloud project + service account key (or OAuth token).
  • Bogus project → 404 (verified).

Rate Limits & Notes

  • Google Cloud pricing (check the docs).
  • Intents, sessions, entities.

FAQ

Is Dialogflow free? Free tier on Google Cloud; usage-based after.

Why 404? A bogus project returns 404 (verified) — use a real GCP project.

What’s the auth style? Google Cloud service account / OAuth.

More in Machine Learning

APIAuthHTTPSCORS
AI Economics Tools

Token cost, LLM energy, agent-hour and Proof-Adjusted Autonomy calculators by Michał Piszczek

No authYesYes
AI For Thai

Free Various Thai AI API

API KeyYesYes
BRAINIALL

PT-BR and Spanish audio transcription with diarization and SRT/VTT

API KeyYesYes
Clarifai

Computer Vision

OAuthYesUnknown
Cloudmersive

Image captioning, face recognition, NSFW classification

API KeyYesYes