Centrexion Therapeutics Media API

openapi: 3.2.0
info:
  title: Centrexion Therapeutics Content Media API
  version: wp/v2
  summary: Anonymously readable WordPress REST content API behind centrexion.com.
  description: The read-only content surface Centrexion Therapeutics exposes at https://centrexion.com/wp-json. Centrexion is a late clinical-stage biopharmaceutical company in Boston, Massachusetts developing non-opioid, non-addictive therapies for chronic pain — led by CNTX-4975, a synthetic trans-capsaicin injected intra-articularly that reversibly deactivates TRPV1-expressing pain fibers — alongside an emerging immunology and inflammation portfolio. It runs no developer program and markets no product API. This document is an API Evangelist derivation of the WordPress `wp/v2` and `oembed/1.0` route index the site publishes at /wp-json/, restricted to the operations that were verified to return data anonymously on 2026-08-09. Write operations, `/wp/v2/settings`, `/wp/v2/menus`, `/wp/v2/menu-locations`, `/wp/v2/themes`, `/wp/v2/plugins`, `/wp/v2/block-types`, `/wp/v2/font-collections`, `/wp/v2/icons`, `/wp/v2/sidebars`, `/wp/v2/widget-types`, the pattern-directory routes, the `wp-abilities/v1` namespace and the whole plugin-administration surface all require authentication and are deliberately excluded — see x-api-evangelist-provenance.
  contact:
    name: Centrexion Therapeutics
    url: https://centrexion.com/
    email: info@centrexion.com
  x-api-evangelist-provenance: 'Derived by the API Evangelist enrichment pipeline from the live WordPress REST route index at https://centrexion.com/wp-json/ (320 routes across 10 namespaces) and verified against live anonymous responses on 2026-08-09. Every parameter below appears verbatim in the route index `args` for that endpoint, and every collection count in a description was read from the `X-WP-Total` response header on that date. Centrexion publishes no OpenAPI, no developer documentation and no API reference for this surface; the humanURL in apis.yml points at the upstream WordPress REST handbook that defines the wp/v2 contract. The 14 staff biographies the site publishes are a WordPress custom post type that is NOT registered for REST — it does not appear in /wp/v2/types and has no route — so it is reachable only as HTML and is not modelled here. The deployment is served by nginx on WP Engine, responses carry `x-robots-tag: noindex` and are edge-cached (`x-cacheable: SHORT`, `cache-control: max-age=600`). Nothing here was obtained with credentials.'
servers:
- url: https://centrexion.com/wp-json
  description: Production content API
tags:
- name: media
  description: Media library. `X-WP-Total` reports 43 attachments; anonymous enumeration returns fewer (see the listMedia description).
paths:
  /wp/v2/media:
    get:
      tags:
      - media
      operationId: listMedia
      summary: List media library attachments
      description: 'Lists media attachments. This collection has a documented counting anomaly on this deployment: `X-WP-Total` consistently reports 43 and `X-WP-TotalPages` is computed from it, but the anonymous result set is always smaller than the requested page — observed 2026-08-09 as 0 items for `per_page=1`, 2 for `per_page=5`, 7 for `per_page=10` and 26 for `per_page=100`. Roughly 17 attachments are counted by the header but filtered out of the anonymous response, so `X-WP-Total` must not be trusted as the retrievable item count and a client must page to exhaustion rather than relying on `X-WP-TotalPages`. Observed MIME types across the 26 retrievable items: 13 image/jpeg, 11 image/png, 1 video/mp4, 1 empty.'
      parameters:
      - $ref: '#/components/parameters/Context'
      - $ref: '#/components/parameters/Page'
      - $ref: '#/components/parameters/PerPage'
      - $ref: '#/components/parameters/Search'
      - $ref: '#/components/parameters/After'
      - $ref: '#/components/parameters/Before'
      - $ref: '#/components/parameters/ModifiedAfter'
      - $ref: '#/components/parameters/ModifiedBefore'
      - $ref: '#/components/parameters/Exclude'
      - $ref: '#/components/parameters/Include'
      - $ref: '#/components/parameters/Offset'
      - $ref: '#/components/parameters/Order'
      - $ref: '#/components/parameters/Slug'
      - name: media_type
        in: query
        description: Limit result set to attachments of a particular media type.
        schema:
          type: string
          enum:
          - image
          - video
          - text
          - application
          - audio
      - name: mime_type
        in: query
        description: Limit result set to attachments of a particular MIME type.
        schema:
          type: string
          examples:
          - image/png
      responses:
        '200':
          description: A collection of media attachments
          headers:
            X-WP-Total:
              description: Total reported by WordPress. Unreliable on this deployment — see the operation description.
              schema:
                type: integer
                examples:
                - 43
            X-WP-TotalPages:
              description: Total number of pages available, computed from X-WP-Total.
              schema:
                type: integer
          content:
            application/json:
              schema:
                type: array
                items:
                  $ref: '#/components/schemas/MediaItem'
        '400':
          $ref: '#/components/responses/BadRequest'
  /wp/v2/media/{id}:
    get:
      tags:
      - media
      operationId: getMediaItem
      summary: Get a single media attachment
      description: Retrieves one attachment by numeric ID, including `source_url`, `filesize`, `mime_type` and the generated size variants under `media_details`. Id 181 is the site logo (Centrexion_LOGO_275px.png).
      parameters:
      - $ref: '#/components/parameters/PathId'
      - $ref: '#/components/parameters/Context'
      responses:
        '200':
          description: A media attachment
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/MediaItem'
        '404':
          $ref: '#/components/responses/NotFound'
components:
  parameters:
    Search:
      name: search
      in: query
      description: Limit results to those matching a string.
      schema:
        type: string
    ModifiedBefore:
      name: modified_before
      in: query
      description: Limit response to posts modified before a given ISO 8601 compliant date.
      schema:
        type: string
        format: date-time
    After:
      name: after
      in: query
      description: Limit response to posts published after a given ISO 8601 compliant date.
      schema:
        type: string
        format: date-time
    Offset:
      name: offset
      in: query
      description: Offset the result set by a specific number of items.
      schema:
        type: integer
    ModifiedAfter:
      name: modified_after
      in: query
      description: Limit response to posts modified after a given ISO 8601 compliant date.
      schema:
        type: string
        format: date-time
    Page:
      name: page
      in: query
      description: Current page of the collection.
      schema:
        type: integer
        minimum: 1
        default: 1
    Before:
      name: before
      in: query
      description: Limit response to posts published before a given ISO 8601 compliant date.
      schema:
        type: string
        format: date-time
    PerPage:
      name: per_page
      in: query
      description: Maximum number of items to be returned in the result set. Values above 100 return 400 rest_invalid_param.
      schema:
        type: integer
        minimum: 1
        maximum: 100
        default: 10
    Context:
      name: context
      in: query
      description: Scope under which the request is made; determines fields present in the response.
      schema:
        type: string
        enum:
        - view
        - embed
        - edit
        default: view
    Exclude:
      name: exclude
      in: query
      description: Ensure result set excludes specific IDs.
      schema:
        type: array
        items:
          type: integer
    Order:
      name: order
      in: query
      description: Order sort attribute ascending or descending.
      schema:
        type: string
        enum:
        - asc
        - desc
        default: desc
    PathId:
      name: id
      in: path
      required: true
      description: Unique identifier for the object.
      schema:
        type: integer
    Slug:
      name: slug
      in: query
      description: Limit result set to items with one or more specific slugs.
      schema:
        type: array
        items:
          type: string
    Include:
      name: include
      in: query
      description: Limit result set to specific IDs.
      schema:
        type: array
        items:
          type: integer
  schemas:
    RenderedText:
      type: object
      description: WordPress rendered-text object.
      properties:
        rendered:
          type: string
          description: HTML for the object
          transformed for display.: null
        protected:
          type: boolean
          description: Whether the content is protected with a password.
    Error:
      type: object
      description: The WordPress REST error envelope. Not RFC 9457 problem+json.
      required:
      - code
      - message
      - data
      properties:
        code:
          type: string
          description: Machine-readable error code.
          examples:
          - rest_post_invalid_id
        message:
          type: string
          description: Human-readable error message.
          examples:
          - Invalid post ID.
        data:
          type: object
          properties:
            status:
              type: integer
              description: The HTTP status code.
              examples:
              - 404
            params:
              type: object
              description: Per-parameter messages, present on rest_invalid_param.
              additionalProperties:
                type: string
            details:
              type: object
              description: Per-parameter structured detail, present on rest_invalid_param.
              additionalProperties:
                type: object
    MediaItem:
      type: object
      description: A media library attachment.
      properties:
        id:
          type: integer
        date:
          type: string
          format: date-time
        date_gmt:
          type: string
          format: date-time
        guid:
          $ref: '#/components/schemas/RenderedText'
        modified:
          type: string
          format: date-time
        modified_gmt:
          type: string
          format: date-time
        slug:
          type: string
        status:
          type: string
        type:
          type: string
          examples:
          - attachment
        link:
          type: string
          format: uri
        title:
          $ref: '#/components/schemas/RenderedText'
        author:
          type: integer
        comment_status:
          type: string
        ping_status:
          type: string
        template:
          type: string
        meta:
          type: object
        alt_text:
          type: string
        caption:
          $ref: '#/components/schemas/RenderedText'
        description:
          $ref: '#/components/schemas/RenderedText'
        media_type:
          type: string
          enum:
          - image
          - file
        mime_type:
          type: string
        media_details:
          type: object
          description: Width
          height: null
          file: null
          filesize and the generated size variants.: null
        post:
          anyOf:
          - type: integer
          - type: 'null'
          description: The ID for the associated post.
        source_url:
          type: string
          format: uri
          description: Direct URL to the original file.
        filename:
          type: string
        filesize:
          type: integer
        featured_media:
          type: integer
        class_list:
          type: array
          items:
            type: string
        aioseo_notices:
          type: array
          items:
            type: string
        _links:
          type: object
  responses:
    BadRequest:
      description: Invalid parameter — code `rest_invalid_param`
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    NotFound:
      description: Object not found — code `rest_post_invalid_id`
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'