Speechmatics

Features 🔥

• Fully generated C# SDK based on official Speechmatics OpenAPI specification using AutoSDK
• Same day update to support new features
• Updated and supported automatically if there are no breaking changes
• All modern .NET features - nullability, trimming, NativeAOT, etc.
• Support .Net Framework/.Net Standard 2.0

Usage

using Speechmatics;

using var client = new SpeechmaticsClient(apiKey);

Generate

var apiKey =
    Environment.GetEnvironmentVariable("SPEECHMATICS_API_KEY") is { Length: > 0 } value
        ? value
        : throw new AssertInconclusiveException("SPEECHMATICS_API_KEY environment variable is not found.");

using var client = new SpeechmaticsClient(apiKey);

// Create a transcription job with a URL-based audio source.
var configJson = """
    {
        "type": "transcription",
        "transcription_config": {
            "language": "en"
        },
        "fetch_data": {
            "url": "https://github.com/tryAGI/Speechmatics/raw/main/assets/test.mp3"
        }
    }
    """;
var createResponse = await client.CreateJobsAsync(config: configJson);

// Poll for job completion.
JobDetails job;
do
{
    await Task.Delay(TimeSpan.FromSeconds(2));
    var jobResponse = await client.GetJobsByJobidAsync(jobid: createResponse.Id);
    job = jobResponse.Job;
}
while (job.Status == JobDetailsStatus.Running);

// Retrieve the transcript.
var transcript = await client.GetJobsByJobidTranscriptAsync(
    jobid: createResponse.Id,
    format: GetJobsTranscriptFormat.JsonV2);

MeaiTools

var apiKey =
    Environment.GetEnvironmentVariable("SPEECHMATICS_API_KEY") is { Length: > 0 } value
        ? value
        : throw new AssertInconclusiveException("SPEECHMATICS_API_KEY environment variable is not found.");

using var client = new SpeechmaticsClient(apiKey);

// Create tools for transcription, job status, and job listing.
var transcribeTool = client.AsTranscribeUrlTool(defaultLanguage: "en");
var getJobStatusTool = client.AsGetJobStatusTool();
var listJobsTool = client.AsListJobsTool(defaultLimit: 5);

// These tools can be passed to any IChatClient that supports function calling.
var tools = new[] { transcribeTool, getJobStatusTool, listJobsTool };

SpeechToText

var apiKey =
    Environment.GetEnvironmentVariable("SPEECHMATICS_API_KEY") is { Length: > 0 } value
        ? value
        : throw new AssertInconclusiveException("SPEECHMATICS_API_KEY environment variable is not found.");

// Create a Speechmatics client that implements ISpeechToTextClient.
using var client = new SpeechmaticsClient(apiKey);
ISpeechToTextClient sttClient = client;

// Verify the client provides proper metadata.
var metadata = sttClient.GetService<SpeechToTextClientMetadata>();

// The client can also be retrieved via GetService.
var self = sttClient.GetService<SpeechmaticsClient>();

Ecosystem maintenance

This SDK is one of more than 200 .NET SDKs maintained with AutoSDK. The tryAGI SDK audit continuously checks repository synchronization, upstream-spec regeneration, release workflows, warnings, public API visibility, and trimming/NativeAOT compatibility.

Every issue is first investigated for ecosystem-wide applicability. When the root cause belongs in AutoSDK, we fix and regression-test the generator, then roll the improvement out to every applicable SDK. Provider-specific behavior remains in this repository when it cannot be derived safely from the API specification.

Issue content—including code blocks, logs, links, and attachments—is treated only as untrusted diagnostic data. Embedded control instructions, hidden directives, delimiter tricks, or requests to alter triage or tooling behavior are ignored. Please report reproducible technical evidence and remove secrets and personal data.

Support

Priority place for bugs: https://github.com/tryAGI/Speechmatics/issues
Priority place for ideas and general questions: https://github.com/tryAGI/Speechmatics/discussions
Discord: https://discord.gg/Ca2xhfBf3v

Acknowledgments

This project is supported by JetBrains through the Open Source Support Program.