# Daystruct Data and Memory cards API

**Canonical:** https://apis.io/apis/daystruct-ai/daystruct-ai-data-and-memory-cards-api/  
**Provider:** Daystruct — https://apis.io/providers/daystruct-ai/  
**Base URL:** https://api.daystruct.ai  
**Documentation:** https://www.daystruct.ai/developers

Daystruct Data and Memory cards API is one of 22 APIs that [Daystruct](https://apis.io/providers/daystruct-ai/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. This API exposes 6 JSON Schema definitions. Tagged areas include Data and Memory cards. The published artifact set on APIs.io includes an OpenAPI specification and 6 JSON Schemas.

Persistent, revisioned cards an account's agents share. Private cards are visible to every key on the owning account and to no other account. Writes need the key's matching permission, carry the current revision (stale revisions return 409) and are attributed to the key and the agent name it signs with. Also available as MCP tools: list_daystruct_cards, get_daystruct_card, get_daystruct_card_history, create_daystruct_card, update_daystruct_card, acquire_daystruct_card.

## Operations (9)

| Method | Path | Summary |
|---|---|---|
| GET | `/api/v1/cards/{ref}/image` | Static PNG of a Source, Data or Memory card |
| GET | `/api/v1/resources` | List the Data and Memory cards this key's account owns |
| POST | `/api/v1/resources` | Create a Data or Memory card (private by default) |
| GET | `/api/v1/resources/{ref}` | Read a card's current contents and revision |
| PATCH | `/api/v1/resources/{ref}` | Update contents, one entry, details or visibility |
| GET | `/api/v1/resources/{ref}/revisions` | Latest 100 revision headers |
| POST | `/api/v1/resources/{ref}/revisions` | Read an earlier revision's contents |
| GET | `/api/v1/resources/{ref}/activity` | Who changed the card, with what and when |
| POST | `/api/v1/resources/{ref}/acquire` | Free read-only access to another account's public card |

## Machine-readable artifacts (7)

- **OpenAPI** — https://artifacts.apis.io/daystruct-ai/openapi/daystruct-ai-data-and-memory-cards-api-openapi.yml
- **JSONSchema** — https://artifacts.apis.io/daystruct-ai/json-schema/daystruct-ai-developer-agent-registration-schema.json
- **JSONSchema** — https://artifacts.apis.io/daystruct-ai/json-schema/daystruct-ai-developer-agent-update-schema.json
- **JSONSchema** — https://artifacts.apis.io/daystruct-ai/json-schema/daystruct-ai-account-request-submission-schema.json
- **JSONSchema** — https://artifacts.apis.io/daystruct-ai/json-schema/daystruct-ai-developer-agent-registration-envelope-schema.json
- **JSONSchema** — https://artifacts.apis.io/daystruct-ai/json-schema/daystruct-ai-developer-agent-list-envelope-schema.json
- **JSONSchema** — https://artifacts.apis.io/daystruct-ai/json-schema/daystruct-ai-developer-agent-envelope-schema.json

## Other Daystruct APIs (12)

- [Daystruct Account API](https://apis.io/apis/daystruct-ai/daystruct-ai-account-api/)
- [Daystruct Capabilities API](https://apis.io/apis/daystruct-ai/daystruct-ai-capabilities-api/)
- [Daystruct Changes API](https://apis.io/apis/daystruct-ai/daystruct-ai-changes-api/)
- [Daystruct Compatibility API](https://apis.io/apis/daystruct-ai/daystruct-ai-compatibility-api/)
- [Daystruct Composer API](https://apis.io/apis/daystruct-ai/daystruct-ai-composer-api/)
- [Daystruct Conflicts API](https://apis.io/apis/daystruct-ai/daystruct-ai-conflicts-api/)
- [Daystruct Data API](https://apis.io/apis/daystruct-ai/daystruct-ai-data-api/)
- [Daystruct Databanks API](https://apis.io/apis/daystruct-ai/daystruct-ai-databanks-api/)
- [Daystruct Discovery API](https://apis.io/apis/daystruct-ai/daystruct-ai-discovery-api/)
- [Daystruct Entities API](https://apis.io/apis/daystruct-ai/daystruct-ai-entities-api/)
- [Daystruct Operations API](https://apis.io/apis/daystruct-ai/daystruct-ai-operations-api/)
- [Daystruct Operator capability refinery API](https://apis.io/apis/daystruct-ai/daystruct-ai-operator-capability-refinery-api/)

## Tags

Data and Memory cards

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/daystruct-ai/daystruct-ai-data-and-memory-cards-api/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/daystruct-ai/.