> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://onepin.ai/docs/workflow/accuracy-validator/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://onepin.ai/_mcp/server.

# Accuracy validator

> The Onepin Accuracy validator (validator_error_rate) — transcribes generated audio and compares it to the script, scoring word accuracy and retrying failing lines.

**Family: Validator · `type: validator_error_rate`**

The Accuracy validator answers one question: **did the audio say the words?** It transcribes the generated audio and compares it to the script, scoring word accuracy for each line. Lines below the bar are retried; lines at or above it pass.

New to validators? Start with [how validators work](/docs/workflow/validators) — the pass/fail routing and retry behavior here are shared by every validator.

## Config

| Config key    | Default | Range                                           |
| ------------- | ------- | ----------------------------------------------- |
| `threshold`   | `93`    | 70–99 (% word accuracy required to pass)        |
| `max_retries` | `3`     | 1–50 (regeneration attempts for a failing line) |

```python
node["config"] = {"threshold": 93.0, "max_retries": 3}
```

This is the check that makes output "production-ready" — mispronounced or dropped words are caught and regenerated automatically before export.

## Inspect this node

#### Python

```python
client.nodes.get_node_detail(node_type="validator_error_rate").data
```

#### CLI

```bash
onepin nodes show validator_error_rate
```

#### API

```bash
curl https://api.onepin.ai/api/v2/nodes/validator_error_rate \
  -H "Authorization: Bearer $ONEPIN_API_KEY"
```

## Related

* [Validators](/docs/workflow/validators) — pass/fail and retry, shared behavior
* [Pronunciation validator](/docs/workflow/pronunciation-validator) — was each word pronounced correctly?
* [Naturalness validator](/docs/workflow/naturalness-validator) — does it sound human?
* [Noise validator](/docs/workflow/noise-validator) — is it clean?

> Onepin is a voice workflow platform that orchestrates, validates, and ships production-ready audio across 33 TTS models.