ENLISTING FOUNDING OPERATORS · PRE-LAUNCH

The command
center for your
card business.

Not a listing tool. An operations platform. C3I tells you what to price, what to grade, what to relist — and runs the workflow from intake to shipping label. Built by an operator, for operators.

Request access →
Command
The seller's chair. Your operating picture.
Control
Channel kill-switch. Inventory, atomic.
Communications
Unified inbox. Disputes. Mass messages.
LIVE
Intelligence
▸Live market comps. Pricing, grading, drift alerts.
FIG.01 · C3I OPS SCHEMATIC · REV 2026.04SHEET 1 OF 1 · SCALE 1:1 · UNITS · ITEMSC1.1TIER · ACCESSseller permissionsI.1INTAKEtext · bulk · APII.2CSV IMPORTinventory migrateI.3MANUALsingles · one-offI.B · INTELLIGENCE HUBLIVELive market comps driveevery recommendation.LIVE COMPS · DECISIONS · ALERTS142MLIVE COMPS12sAVG DECIDE4.1kDRIFT TICKS / DAYI.B1PRICINGlive compsI.B2GRADINGPSA pipelineI.B3DRIFTprice monitorI.B4STALEaging detectLOT?YNX-LIST?YNGRADE?YNC2.1EBAYdirect APIC2.2SHOPIFYcross-listKILL-SWITCHC2.3 · PLANNED CHANNELSWHATNOTCOLLXMERCARIC3 · COMMUNICATIONSINBOUND · OUTBOUNDC3.1INBOXbuyer messages · broadcastC3.2DISPUTESINR · SNADC3.3REFUNDone-clickC3.4AUTOMATIONtrigger-basedC2.5PICKlocation-awareC2.6PACKcustom templatesC2.7SHIPone-click labelsC2.8TRACKmanage by exceptionDRIFT FEEDBACKD1 · STATE STORE · SOURCE OF TRUTHavailable·listed·in_lot·sold·shipped·deliveredWRITE-AHEAD · APPEND-ONLYITEM FLOW · AMBIENT MOTION▶ LIVE IN OPERATION AT C3-DO
50KCARDS · UPPER BOUND
LIVEPRICING · MARKET COMPS
2CHANNELS · LIVE SYNC
7OPERATIONS COVERED
§ 01 · CAPABILITIES

Six surfaces. One operating picture. Built for the seller who ships fifty orders before lunch.

DOCTRINE · 2026
I.INTAKE

Intake resolves cards into structured listings.

Type a name, paste a list, or bulk-add by ID. C3I returns structured items with live comp data, ready to list as singles or composed into lots.

  • Search · live comps
  • Bulk add by ID
  • Singles or auto-lots
II.INTELLIGENCE

It tells you what to price, grade, and relist.

Live pricing recommendations from real market comps. Grade-profit math against graded sales. Stale listing detection and market drift alerts.

  • Live pricing
  • Grade-profit math
  • Drift alerts
III.PUBLISH

eBay and Shopify, one source of truth.

Direct API publishing. Automated cross-listing with kill-switch sync — when an item sells on either channel, the other goes dark within minutes.

  • eBay direct API
  • Shopify cross-list
  • Kill-switch sync
IV.COMMSIN DEVELOPMENT

One inbox. Disputes visible. Refunds in one click.

Unified messaging across orders. INRs and SNADs surfaced before they escalate. Mass-message multi-buyers; consolidate threads.

  • Unified inbox
  • Dispute queue
  • One-click refund
V.FULFILLMENT

Pick lists by location. Labels by best rate.

Generate pick lists sorted by your storage layout. Custom packing slip templates. Shippo-powered rate shopping across carriers.

  • Location-sorted picks
  • Custom slips
  • Shippo rate shop
VI.LISTINGS

Templates, SEO titles, item specifics — handled.

Branded description templates. Automated SEO title generation tuned to category. Item specifics extracted from comps.

  • Template library
  • SEO titles
  • Auto specifics
§ 02 · DEBRIEF

Questions, answered.

Plain answers from operators, not marketing copy.

01What is C3I?+

An operations platform for card sellers. Listing tools make sellers list faster — C3I makes them operate smarter. Pricing intelligence, grade-profit math, stale detection and channel sync are first-class, not add-ons, and the workflow runs end to end: intake, pricing, publishing, orders, shipping label.

02Where does the pricing data come from?+

Live market comps power every recommendation — pricing, grade-profit math, drift alerts. The data layer is integration-agnostic and will continue to expand as new sources come online.

03Who runs C3-DO?+

C3-DO is a Dayton, OH collectibles retail business operated by a Navy veteran. C3I is the in-house operations platform — built by an operator, for operators, and running C3-DO's live storefronts today.

04When can I get in?+

C3I is in production use at C3-DO today, and we're enlisting a founding cohort of operators ahead of public launch. Request access and we'll reach out as seats open — founding operators get a guided import of their existing inventory.

READY ROOM

Stop running your business out of tabs.

C3I is enlisting founding operators ahead of launch. Bring your eBay account; we'll bring everything else.

Request access → FOUNDING COHORT · LIMITED SEATS or write us: support@c3i.io