Can AI agents use Caliber without a key?

Yes. The /v1 read endpoints, the MCP server at /mcp, and /llms.txt are all keyless and rate-limited, so any AI tool can read live prices and link back. A key raises the limits and unlocks writes.

Caliber API

Pricing

Q: Is there a free watch price API?

Yes. Reads on the /v1 price database are keyless (no account, no key). A free account adds an API key that raises the limits and unlocks writes and deeper resale data.

Read the full watches price database free, with no API key. A free account mints a key for the richer, keyed data across eBay & Chrono24. Paid plans add call volume plus resale depth, up to the full resale curve.

Base URLcaliberwatches.xyz
Readskeyless
AlsoMCP · llms.txt · OpenAPI

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Plans

Every tier below the free row includes everything above it. The REST API column marks the plans that can call the keyed /v1 endpoints off-site.

Plan	Monthly	Best for	REST API
Free Sample the data API.	Free	Free API key	Yes
Starter Know what to pay before you buy.	$12/mo	5 Buyer's Briefs / day	No
Pro Never overpay on a drop again.	$29/mo	15 Buyer's Briefs / day	No
Reseller Best for API Price every watch like a pro.	$89/mo	40 Buyer's Briefs / day	Yes
Mogul Run resale like a business.	$199/mo	100 Buyer's Briefs / day	Yes
Tycoon Enough for a whole team.	$599/mo	300 Buyer's Briefs / day	Yes
Magnate Pricing at scale, for the whole floor.	$1,799/mo	1,000 Buyer's Briefs / day	Yes

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What you're subscribing to

One watch price dataset, reconciled across eBay & Chrono24, delivered every way a developer or an agent might want it:

REST API: /v1: the price database. Reads are keyless; a key unlocks writes and deeper resale data, keyed by plan.
MCP server: /mcp: typed tools your AI client connects to and calls live.
For LLMs: OpenAPI and llms.txt: machine-readable, built to be read.

Questions

Is there a free watch price API?

Yes. Reads on the /v1 price database are keyless. A free account adds an API key that raises the limits and unlocks writes and deeper resale data.

What do paid plans add over free?

Higher call volume plus resale depth. Reseller and up include REST API access; Mogul and up add resale-value summaries; the top tiers add the full resale curve.

Can AI agents use it without a key?

Yes. The /v1 read endpoints, the MCP server, and llms.txt are all keyless and rate-limited. A key raises the limits and unlocks writes.