# Save Discover Later

> Programmatic bookmarking API. Agents save URLs on behalf of users; humans browse via Save Boxes and The Lookout.

Site: https://savediscoverlater.com
Full manual: /llms-full.txt
OpenAPI: /openapi.json
Docs: /docs

## Pages

- [Home](/): Save now. Discover later. A calm, personalized library for links, articles, videos and notes.
- [The Lookout](/lookout): Browse public Save Boxes curated by readers.
- [Pricing](/pricing): Saver (free), Curator ($4.99/mo), and the coming-soon Archivist waitlist.
- [Features](/features): Every Save for Later feature in one place — one-click clipping, AI auto-tagging, smart Save Boxes.
- [Chrome Extension](/extension): Save from any tab in one click.
- [Blog](/blog): The Journal — curation, second-brain, and product updates.
- [Save Box Guide](/savebox): What a Save Box is and how to build one.
- [Support](/support): Submit queries, feedback, and support requests.
- [FAQ](/faq): How AI auto-tagging, limits, and Save Boxes work.
- [About](/about): What Save for Later is and who it's for.
- [Privacy](/privacy): How saved items and account data are handled.
- [Terms](/terms): Terms of service.
- [Public Save Box](/box/:slug): A reader's published Save Box (dynamic, one example per box).

## Pricing (human plans, savediscoverlater.com/pricing)

- Saver — Free. Up to 200 saved items, unlimited Save Boxes, AI auto-tagging for the first 20 items/month, basic keyword search, read-only Discovery feed, 1 JSON/CSV export per month.
- Curator — $4.99/month or $47.99/year (20% off). Full AI, up to 500 saved items, AI auto-tagging, advanced search and filters, public Save Boxes, unlimited exports.
- Archivist — Coming soon (waitlist, not purchasable). Unlimited everything.

Currency: USD. Billing via Stripe. Plans change at /pricing; that page is the source of truth.

## Pricing (agent API)

- Per-call: $0.05 per saved link via Stripe SPT (Machine Payments Protocol), 20 req/min, 200/day.
- Subscription keys: rate limits 60–120 req/min depending on plan.


## Endpoint

`POST https://jnexdctcorewxreylfbi.supabase.co/functions/v1/api-save`

Headers:
- `Content-Type: application/json`
- Auth (one of):
  - `Authorization: Bearer sdl_live_<key>`
  - `Payment: <stripe-spt>` + `X-On-Behalf-Of: <user_uuid>`
- Optional: `Idempotency-Key: <uuid>`

Body (≤2KB):
```json
{ "url": "https://...", "title": "?", "notes": "?", "tags": ["?"], "space_id": "?uuid" }
```

Limits: url ≤2048, title ≤300, notes ≤1500, tags ≤10×32.

## Responses

- `200`: `{ id, url, title, charged_cents, payment_method }`
- `400 invalid_url|invalid_json`: do not retry.
- `402 payment_required`: header `WWW-Authenticate: Payment realm="savediscoverlater", scheme="stripe-spt", price="5", currency="USD"`. Mint SPT and retry, or use API key.
- `429 rate_limited`: honour `Retry-After`, exponential backoff.
- `500 save_failed`: retry up to 3× with backoff.

## Agent flow

1. POST without auth → expect 402.
2. Parse `WWW-Authenticate`, mint SPT for advertised price.
3. Retry with `Payment` + `X-On-Behalf-Of`.
4. Or use a subscription key (`Authorization: Bearer`).

Agent-saved items default to private. Public exposure requires the user to attach to a public Save Box.

## Discovery

- /sitemap.xml
- /pricing (Product + Offer JSON-LD)
- /terms, /privacy
- Status: GET /api/status