Pegasus Three Sixty · Valuation evidence pack

Private-market marks with proof attached.

Spearhead turns public financing events into review-ready valuation reads: a point estimate, a confidence band, source links, and a published scorecard of what we got wrong.

80% bandConformal intervals on every mark
33 namesCoverage universe with source lineage
PublicScorecards, misses, and methodology versions

CoreWeave walk-forward

Illustrative backtest replay — not a live mark. Every API payload labels data_mode and provenance.

Call the API

Read-only JSON over HTTPS. One header: X-API-Key. Every response includes provenance and methodology metadata.

Base https://api.pegasusthreesixty.com/v1Auth X-API-Key header

Quickstartcurl

export SPEARHEAD_API_KEY=sph_test_example_key

curl -sS "https://api.pegasusthreesixty.com/v1/companies/coreweave/marks?coverage=80" \
  -H "X-API-Key: $SPEARHEAD_API_KEY"

Start free

Full API reference · OpenAPI spec · Compare tiers

01
Enter your email
We send a one-time link. No password to manage.
02
Open your workspace
Mint an API key and see your tier in one place.
03
Call /v1
JSON marks with intervals, events, and audit metadata.

01 / Overview

Available endpoints

Read-only JSON at https://api.pegasusthreesixty.com/v1. Expand any row for curl and response shape.

GET/v1/companiesList available companies and latest marks.

GET/v1/companies/{slug}Fetch one company profile and its latest mark.

GET/v1/companies/{slug}/marksHistoric marks with 80% band, optional 95% band.

GET/v1/companies/{slug}/eventsAppend-only event history for this company.

GET/v1/companies/{slug}/resolutionAudit bundle with signature for enterprise attestations.

GET/v1/usageCurrent key context and rate-limit state.

02 / Examples

Endpoint examples

GET/v1/companiesResearch+

List available companies and latest marks.

Parameters: limit, cursor, sector, status, sort

Requestcurl

curl -sS "https://api.pegasusthreesixty.com/v1/companies?limit=50&sort=-value_usd" \
  -H "X-API-Key: $SPEARHEAD_API_KEY"

Response example200 OK

{
  "meta": { ... },
  "companies": [...],
  "page": { "limit": 50, "next_cursor": "eyJvZmZzZXQiOjF9", "has_more": true }
}

GET/v1/companies/{slug}Research+

Fetch one company profile and its latest mark.

Requestcurl

curl -sS "https://api.pegasusthreesixty.com/v1/companies/coreweave" \
  -H "X-API-Key: $SPEARHEAD_API_KEY"

Response example200 OK

{
  "meta": { ... },
  "slug": "coreweave",
  "name": "CoreWeave",
  "latest_mark": { ... },
  "observations": [ ... ]
}

GET/v1/companies/{slug}/marksResearch (80) / Pro+ (80 and 95)

Historic marks with 80% band, optional 95% band.

Parameters: coverage = 80 | 95

Requestcurl

curl -sS "https://api.pegasusthreesixty.com/v1/companies/coreweave/marks?coverage=80" \
  -H "X-API-Key: $SPEARHEAD_API_KEY"

Response example200 OK

{
  "meta": { ... },
  "slug": "coreweave",
  "coverage": 80,
  "series": [
    { "date": "2025-01-15", "mark_usd": 20100000000, "lower_usd": 9900000000, "upper_usd": 41000000000 }
  ],
  "events": [ ... ]
}

GET/v1/companies/{slug}/eventsPro+

Append-only event history for this company.

Requestcurl

curl -sS "https://api.pegasusthreesixty.com/v1/companies/coreweave/events" \
  -H "X-API-Key: $SPEARHEAD_API_KEY"

Response example200 OK

{
  "meta": { ... },
  "slug": "coreweave",
  "events": [ { "occurred_on": "2025-01-15", ... } ]
}

GET/v1/companies/{slug}/resolutionEnterprise

Audit bundle with signature for enterprise attestations.

Requestcurl

curl -sS "https://api.pegasusthreesixty.com/v1/companies/coreweave/resolution" \
  -H "X-API-Key: $SPEARHEAD_API_KEY"

Response example200 OK

{
  "slug": "coreweave",
  "value_usd": 22062735430,
  "band_80": { "lower": 10903281498, "upper": 44643834494 },
  "band_95": { "lower": 7476958887, "upper": 65101908681 },
  "signature": "9f...a08"
}

GET/v1/usageResearch+

Current key context and rate-limit state.

Requestcurl

curl -sS "https://api.pegasusthreesixty.com/v1/usage" \
  -H "X-API-Key: $SPEARHEAD_API_KEY"

Response example200 OK

{
  "tier": "free",
  "rate_per_min": 60,
  "limits": { ... }
}

03 / Quickstart

Sample call and response

Quickstart callshell

export SPEARHEAD_API_KEY=sph_live_example_key

curl -sS "https://api.pegasusthreesixty.com/v1/companies?limit=1" \
  -H "X-API-Key: $SPEARHEAD_API_KEY"

Sample response200 OK

{
  "meta": {
    "data_mode": "illustrative",
    "provenance": "backtest",
    "methodology_version": "v0.2.0",
    "dataset_version": "2026-06-14",
    "as_of": "2026-06-10"
  },
  "companies": [ ... ],
  "page": { "limit": 1, "next_cursor": "...", "has_more": true }
}

Quality check before integration

Before using any value in a workflow, check the response meta fields and compare the public data quality card with your required coverage, freshness, licensing, and validation standards.

Competitive QA snapshot: 0 of 18 reviewed vendors publish walk-forward backtests. Spearhead keeps scorecard and miss disclosure in public routes by default.

04 / Authentication

Authentication

Send your key in the request header only: X-API-Key: <your-key>. No OAuth and no query-string API keys. Keys are tenant-scoped and tier-bound.

Response envelope (meta fields)

Field	Type	Description
data_mode	`string`	illustrative or live mode flag.
provenance	`string`	backtest or live source tag.
methodology_version	`string`	The methodology version that produced the payload.
dataset_version	`string`	Version of the curated source dataset.
as_of	`date`	Snapshot date used to generate this response.
disclaimer	`string`	Legal / compliance statement for reuse.

Pagination, filters, and rate limits

Param	Type	Description
limit	`int, 1-200`	Default 50.
cursor	`string`	Opaque cursor from previous response.
sector	`string`	Exact sector match.
status	`private \| ipo_completed`	Lifecycle filter.
sort	`string`	One of slug, name, value_usd, delta_30d_pct. Prefix - for descending.

Rate limits are tier-based: Research 60, Pro 600, Business 3000, Enterprise 6000 req/min. Backoff on 429 and retry after Retry-After seconds.

Error codes

code	Status	Meaning	Cause
missing_api_key	401	Unauthorized	No X-API-Key header.
invalid_api_key	401	Unauthorized	Key is unknown, revoked, or not active.
tier_forbidden	403	Forbidden	Key tier does not include the requested endpoint.
not_found	404	Not Found	Unknown resource (for example slug).
invalid_coverage	422	Unprocessable	coverage is not 80 or 95.
invalid_sort	422	Unprocessable	Sort parameter is outside the whitelist.
bad_cursor	422	Unprocessable	Invalid cursor string for pagination.
rate_limited	429	Too Many Requests	Rate limit exceeded; retry after reset.

05 / Compliance

Compliance and reliability notes

Illustrative / backtest by design

Payloads are labeled clearly with data_mode and provenance. If/when live marks ship, clients can detect that by those values.

Signed records (Enterprise)

Enterprise users can request signed resolution data that includes a cryptographic signature and immutable versioned identifiers for downstream audit systems.

Illustrative / backtest - not live marks. Indicative valuations, not transactable prices. Underlying assets are illiquid; inputs are limited to publicly reported events with source attribution. Pegasus Three Sixty and SpearHead are an information-only valuation product, do not hold client balances, and do not provide investment recommendations.