---
title: "Golden Gate from part plasmids"
method: POST
path: "/golden_gate_from_parts"
tags: ["Enzymes & cloning"]
---

# Golden Gate from part plasmids

`POST /golden_gate_from_parts`

## Request

- Base URL: `https://seqbench.com/api/v1`
- URL: `https://seqbench.com/api/v1/golden_gate_from_parts`
- Auth: none required

Golden Gate as the reaction runs: digest pre-domesticated part plasmids with a Type IIS enzyme and assemble them in the order their OVERHANGS dictate. The fragment released from each part is the one carrying no recognition site (the site goes out with the backbone, which is why a mis-ordered assembly is not re-cut), and the assembly order is an OUTPUT — a set whose overhangs do not close into a single cycle has no product, and the reason is the answer. Distinct from cloning_simulate's `goldengate` method, which does the other job: designing the primers that ADD the sites to BARE parts, assembled in the order you list them.

## Request body

- object
  - `parts` object[], required: The part plasmids: [{ name, sequence, circular }]. Each needs two Type IIS sites facing INWARDS at the part. `circular` defaults to true, which is what a level-0 part plasmid is. 2-24 parts, each at most 30,000 bp and 200,000 bp in total.
  - `enzyme` 'BsaI' | 'BsmBI' | 'BbsI' | 'SapI': Type IIS enzyme (BsaI, BsmBI, BbsI, SapI). NEB's variant names (BsaI-HFv2, BbsI-HF, BsmBI) fold to the parent enzyme; any other name is rejected rather than substituted, since site, spacer and overhang length are all enzyme-specific.

## Response `200`

Tool ran successfully.

- SuccessResponse: Standard success envelope returned by every single-tool call.
  - `ok` unknown, required
  - `tool` string, required: The tool slug that ran.
  - `result` object, required: Tool-specific output object. Its shape depends on the tool — call `GET /{tool}` or see the docs for each tool's fields.
  - `gate` GateResult
    - `pass` boolean, required: True if and only if every hard check passed.
    - `checks` GateCheck[], required
      - `id` string, required
      - `label` string, required
      - `severity` 'hard' | 'soft', required
      - `pass` boolean, required
      - `message` string, required
      - `value` number
      - `threshold` string
    - `notChecked` string[], required: Honest list of what this gate does NOT verify.
  - `provenance` Provenance, required
    - `apiVersion` string, required
    - `tool` union, required: Tool slug, or an array of slugs (one per step) for a workflow.
      - string
      - string[]
    - `generatedAt` string, date-time, required: ISO 8601 timestamp of when the result was generated.

## Other responses

- `400`: Invalid argument or the tool could not run.
- `404`: Unknown tool.
- `429`: Rate limited (metered tools only). Body carries code `rate_limited` and retryable `true`; honor the Retry-After header.
- `503`: A metered tool is momentarily at capacity. The identical request should succeed after Retry-After; body carries code `upstream_unavailable`.

---

[API](https://skmtc.dev/seqbench/apis/seqbench-api.md) · [All operations](https://skmtc.dev/seqbench/apis/seqbench-api/llms.txt) · [OpenAPI document](https://skmtc.dev/seqbench/apis/seqbench-api/revisions/132575216865?raw)