> ## Documentation Index > Fetch the complete documentation index at: https://docs.provenmetal.com/llms.txt > Use this file to discover all available pages before exploring further. # Turn parts on an assembly quote > The MCP's rotate_parts. Before an assembly quote is paid, when its board picture (JLCPCB's own view of each part, pin 1 and polarity marks in magenta) shows a part facing the wrong way, or the customer asks: each part turns by degrees counter-clockwise as seen from its own side, added to any turn it has. The price doesn't change. The reply lists every turn and the board picture drawn with them; the order is placed with the turns. ## OpenAPI ````yaml /api-reference/openapi.json post /v1/quotes/{quote_id}/rotations openapi: 3.1.0 info: title: ProvenMetal API version: 1.0.0 description: >- Everything the ProvenMetal MCP does, over HTTP with an API key: upload a design, get a live JLCPCB quote and checkout link, follow it to delivery, pay with saved details, and check parts and designs. Formal quotes for any fab or assembler are under Orders. servers: - url: https://api.provenmetal.com security: - ApiKey: [] tags: - name: Uploads - name: Quotes - name: Saved details - name: Checks - name: Buy links - name: Orders - name: Account paths: /v1/quotes/{quote_id}/rotations: post: tags: - Quotes summary: Turn parts on an assembly quote description: >- The MCP's rotate_parts. Before an assembly quote is paid, when its board picture (JLCPCB's own view of each part, pin 1 and polarity marks in magenta) shows a part facing the wrong way, or the customer asks: each part turns by degrees counter-clockwise as seen from its own side, added to any turn it has. The price doesn't change. The reply lists every turn and the board picture drawn with them; the order is placed with the turns. operationId: rotate_parts_v1_quotes__quote_id__rotations_post parameters: - name: quote_id in: path required: true schema: type: string maxLength: 80 title: Quote Id requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/RotationsRequest' responses: '200': description: Successful Response content: application/json: schema: $ref: '#/components/schemas/RotationsReply' '422': description: >- A field was refused, or the design needs an answer first (needs_details...) content: application/json: schema: $ref: '#/components/schemas/ErrorReply' 4XX: content: application/json: schema: $ref: '#/components/schemas/ErrorReply' description: Client Error 5XX: content: application/json: schema: $ref: '#/components/schemas/ErrorReply' description: Server Error components: schemas: RotationsRequest: properties: rotations: items: $ref: '#/components/schemas/PartTurn' type: array maxItems: 500 title: Rotations description: The parts to turn, each added to any turn it already has. reset: type: boolean title: Reset description: >- Clear every turn first, so only these remain; with no rotations, clears them all. default: false additionalProperties: false type: object required: - rotations title: RotationsRequest description: >- Everything the MCP rotate_parts tool takes, for an assembly quote before it is paid. RotationsReply: properties: ok: type: boolean title: Ok rotations: items: additionalProperties: true type: object type: array title: Rotations description: Every part's turn on the quote, after this change. message: anyOf: - type: string - type: 'null' title: Message board_image_url: anyOf: - type: string - type: 'null' title: Board Image Url description: >- The board picture drawn with the turns: show it, and ask the customer to check those parts. additionalProperties: true type: object required: - ok - rotations title: RotationsReply ErrorReply: properties: ok: type: boolean const: false title: Ok default: false error: type: string title: Error description: >- The MCP's error code, for example needs_details, rate_limited or no_files. message: type: string title: Message description: What went wrong and what to do, in words to relay. questions: anyOf: - items: additionalProperties: true type: object type: array - type: 'null' title: Questions description: >- needs_details: each open question with its option, choices and usual answer. Answer them and send the same quote again with those fields. known: anyOf: - additionalProperties: true type: object - type: 'null' title: Known description: 'needs_details: what the files already said.' parts: anyOf: - items: additionalProperties: true type: object type: array - type: 'null' title: Parts description: >- needs_part_numbers (and needs_details): the BOM lines to name exactly. off_board_parts: anyOf: - items: additionalProperties: true type: object type: array - type: 'null' title: Off Board Parts description: BOM lines with no pick-and-place position. retry_after_s: anyOf: - type: integer - type: 'null' title: Retry After S description: 'rate_limited: seconds to wait. Also in the Retry-After header.' checkout_url: anyOf: - type: string - type: 'null' title: Checkout Url description: >- card_declined / authentication_required: where the customer pays instead. fields: anyOf: - items: additionalProperties: type: string type: object type: array - type: 'null' title: Fields description: 'invalid_request: each field that was refused and why.' additionalProperties: true type: object required: - error - message title: ErrorReply PartTurn: properties: reference: type: string maxLength: 40 minLength: 1 title: Reference description: The part's reference, as the BOM names it (D1). degrees: type: number maximum: 3600 minimum: -3600 title: Degrees description: >- Degrees counter-clockwise, as seen from the side the part sits on; negative turns it clockwise. additionalProperties: false type: object required: - reference - degrees title: PartTurn description: One part to turn. securitySchemes: ApiKey: type: apiKey in: header name: X-API-Key description: >- Your ProvenMetal API key (`pm_live_...`). `Authorization: Bearer ` also works. ```` This documentation is built and hosted on [Mintlify](https://mintlify.com), a developer documentation platform.