Built to be read by people and machines.

Capability and version contract

Public read-only discovery. Account access and delegated writes are unavailable; a human session is not an agent grant. Contract: seamline-public-discovery/v1.

• public profile

  seamline-public-hub/v2

  public read · free, spark, studio, collective

  Published name, bio and live or coming-soon projects. Missing or private content is absent; source failure is unavailable.

• hub summary

  seamline-public-hub/v2

  public read · free, spark, studio, collective

  Plain text from the same public profile projection. No subscriber identities, voice settings or audience counts.

• public event

  schema.org/Event

  public read · free, spark, studio, collective

  Unlisted and protected events are excluded from discovery. Guest records and RSVP operations are outside the agent contract.

• platform statistics

  analytica-feed-v1

  public read · free, spark, studio, collective

  Privacy-banded aggregates; small cohorts are suppressed. Unavailable or stale is not a count of zero.

• magnet drafts

  No public API version

  human required · free, spark, studio, collective

  Creator-approved content guides drafts. Server-side monthly quota applies; generation is not a public agent endpoint.

• welcome delivery

  No public API version

  human required · spark, studio, collective

  Reviewed sequences need current verified sender readiness and applicable consent. Provider acceptance does not prove inbox delivery.

• creator promotion

  No public API version

  human required · spark, studio, collective

  Creator-controlled cross-promotion; subscriber lists are not swapped or transferred.

• delegated account access

  No public API version

  unavailable · Unavailable on every plan

  Requires a separately supported Obelisk identity grant, explicit scope and action authorization. No agent mutation endpoint is advertised.

Plan eligibility is checked by the server. It does not establish service readiness or grant an agent access.

• free: $0/month, 1 AI magnets/month, 3 projects.
• spark: $12/month, 5 AI magnets/month, 10 projects.
• studio: $29/month, 25 AI magnets/month, 50 projects.
• collective: $79/month, unlimited AI magnets/month, unlimited projects.

Embed a capture form

One script tag on any page. It renders a consent-forward form, attributes the capture to its source, and posts to the creator’s own list.

<script
  src="https://seamline.now/capture.js"
  crossorigin="anonymous"
  data-handle="your-handle"
  data-magnet="your-magnet-id"
  defer
></script>

The subresource-integrity manifest could not be read, so no integrity attribute is shown. That is an absent value, not an optional one — check public/capture.sri.json before embedding.

Machine-readable surfaces

• agents.jsonCapabilities, endpoints and contact for autonomous agents.
• .well-known/llms.txtWhat Seamline is, in the form language models read first.
• .well-known/ai-plugin.jsonLegacy plugin-format metadata; not an account permission grant.
• openapi.yamlThe public API surface, as an OpenAPI document.
• stats.jsonPrecomputed, privacy-banded platform statistics.
• sitemap.xmlEvery public route.

Per-hub endpoints

Public discovery is read-only. The profile and plain-text guide derive from the published hub view. Neither includes subscriber identity, private drafts, voice settings or audience counts.

Read one public profile

Request GET /@demo/persona.json for the fictional sample. A real published hub uses the same seamline-public-hub/v2 shape. The canonical URL is the stable hub ID; project IDs follow published slugs. A missing handle returns 404 with not_found. A temporary source failure returns 503 with temporarily_unavailable and a retry delay. Never infer hidden content from a missing profile.

{
  "schemaVersion": "seamline-public-hub/v2",
  "availability": "published",
  "id": "https://seamline.now/@demo",
  "canonicalUrl": "https://seamline.now/@demo",
  "updatedAt": "2026-09-26T00:00:00Z",
  "name": "Ashwake Worksroom",
  "handle": "demo",
  "bio": "A serialized dark-fantasy RPG about inheritance, ruin, and dangerous promises made under pressure.",
  "projects": [
    {
      "id": "https://seamline.now/@demo/ashwake",
      "name": "Ashwake",
      "description": "A city of oaths and ash. The prologue pack gives subscribers the first factions, the inherited ruin, and one dangerous promise.",
      "status": "live",
      "url": null,
      "updatedAt": "2026-09-26T00:00:00Z"
    },
    {
      "id": "https://seamline.now/@demo/midnight-drafts",
      "name": "Midnight Drafts",
      "description": "A weekly author newsletter. Worldbuilding notes, reading paths, and the parts of the story we haven't shown.",
      "status": "live",
      "url": null,
      "updatedAt": "2026-09-18T00:00:00Z"
    }
  ],
  "example": true
}

GET /@missing-example/persona.json
HTTP 404


{
  "code": "not_found",
  "retryable": false
}

GET /@example/persona.json
HTTP 503
Retry-After: 60
Cache-Control: no-store

{
  "code": "temporarily_unavailable",
  "retryable": true
}

Account access and delegated agent writes are unavailable. A separate supported Obelisk identity grant, explicit scope and human authorization are required before such access can be offered. Do not reuse a creator session token as an agent grant.

Recover from a blocked task

A recorded capture is not delivery confirmation. Review the specific hold rather than retrying an uncertain send.