# Logos Chirality Source Pack

> Logos Chirality Source Pack is a paid API for AI agents from api.unland.dev, paid per call via x402, $0.25/call, status unknown (last checked 2026-09-15).

Retrieves ranked, citable research sources from a curated knowledge index in response to a research query

## Facts

- Endpoint: POST https://api.unland.dev/v1/psi/source-pack
- Price: $0.25/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/logos-chirality-source-pack-69b23eb2
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Z9E_0Iyq3Evb2zmmr-eYX

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability logos-chirality-source-pack-69b23eb2 -d '<json body>'
```

Example prompt: Search the Logos Chirality source pack for up to 5 citable sources on what the CIA's Gateway Process report says about consciousness, and return them ranked by relevance.

## When to prefer this

Choose this endpoint when an agent needs citable, traceable research sources with access URLs rather than synthesized or generated text. Prefer it over general web search when the task requires bibliographic rigor, ranked relevance, or retrieval from a curated index that includes government and archival records. Especially useful for research agents that need to ground claims in verifiable primary sources rather than summaries.

## Known failure modes

- Query too short (under 3 characters) returns validation error
- Query exceeds 2000 character limit returns validation error
- No matching sources found returns empty sources array
- Payment failure or missing x402 payment header returns 402 Payment Required
- maxSources out of range (below 1 or above 10) returns validation error
- Index unavailable returns 503 or similar server error

## How this service works

Returns ranked bibliographic sources, relevance, and likely page locations from the curated Logos Chirality 76-source research index. Settlement is $0.05 plus $0.01 per delivered source, up to $0.25. No source files, private paths, original filenames, or extracted passages are delivered.

## Output

A JSON object containing a ranked list of sources matching the query, each with metadata including title, authors, publication year, kind (e.g. government-record), a stable sourceId, an access URL to the original document, matched pages, matched terms, and a relevance score. Also includes usage stats (deliveredSources), index version, schema version, a generatedAt timestamp, and any applicable limitations.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "query": {
   "type": "string",
   "maxLength": 2000,
   "minLength": 3
  },
  "maxSources": {
   "type": "integer",
   "default": 5,
   "maximum": 10,
   "minimum": 1
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "query": "What does the Gateway Process report say about consciousness?",
  "usage": {
   "deliveredSources": 1
  },
  "product": "logos-chirality-source-pack",
  "sources": [
   {
    "kind": "government-record",
    "rank": 1,
    "year": 1983,
    "title": "Analysis and Assessment of Gateway Process",
    "authors": [
     "Wayne M. McDonnell"
    ],
    "sourceId": "lc20-10",
    "accessUrl": "https://www.cia.gov/readingroom/document/cia-rdp96-00788r001700210016-5",
    "relevance": 1,
    "matchedPages": [
     {
      "page": 1,
      "relevance": 1
     }
    ],
    "matchedTerms": [
     "gateway",
     "consciousness"
    ]
   }
  ],
  "generatedAt": "2026-08-20T00:00:00.000Z",
  "limitations": [],
  "sourceCount": 1,
  "indexVersion": "lc20-hashed-lexical-v1",
  "schemaVersion": "1.0",
  "noSourceTextDelivered": true
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/logos-chirality-source-pack-69b23eb2/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.unland.dev](https://www.zero.xyz/host/api.unland.dev/llms.txt)