Keystone™ — the verified-asset rail for industrialized construction.
Five engines read one signed, hashed, KeyScore-scored module record. Data captured once; margin compounds across five products. Every engine is API-first, audit-grade, and reads the same underlying record — audit-ready equipment records that lenders, insurers, and program offices can price against without reconstructing evidence forensically.
Keystone: three reading levels.
Same concept. Three depths. Pick the one that matches how much time you have. The full detailed page is below.
Keystone is the verified-asset rail for industrial supply chains. Every module a factory produces becomes a signed, hashed, KeyScore-scored record. Five downstream engines read the same record: Registry (passport), Capital Rail (pool-grade pre-screen), Disbursement Rail (verified-release gate), Insurance Rail (resilience pricing), Modular Index (live benchmark). Launched in industrialized construction; the architecture generalizes. Patent pending. Callisto Bridge is data infrastructure, not a regulated financial-services entity.
If you make, finance, insure, or disburse against modular / industrialized-construction / EV-battery / solar / refurbished-industrial assets, Keystone gives every counterparty the shared verified record they cannot get today. Manufacturers pay a per-asset registry toll at insert; every downstream buyer (lender pool grader, HFA disbursement office, MGA underwriter, capital-partner index licensee) pays per verified event on the same record. There is no shared benchmark today because there is no verification layer today. Keystone builds that layer, and every buyer that reads it unlocks a revenue line for the manufacturer. The six-week design-partner pilot ingests 25 to 100 of your anonymized records and produces the actual registry, KeyScore, and downstream engine outputs against your data. Zero platform fee during pilot; preferred production pricing.
Keystone's five engines are independent API-first services over a shared per-asset registry. The record is signed with ECDSA over canonical serialization at insert; every lifecycle state change appends a hash-chained immutable event. KeyScore is a deterministic function of verified attributes (QA composite, condition, resilience class, value attributes, inspection outcome); the formula is public and reproducible. Capital Rail returns weighted-KeyScore + AAA→NR indicative grade + senior/mezz/equity tranche pre-screen; NRSRO partners issue the official rating. Disbursement Rail validates asset state against milestone requirements at release-time and returns a signed authorization; the payment infrastructure (federal/state/Treasury/fiscal-agent) moves funds. Insurance Rail computes rate bps from verified attributes; licensed MGA partners bind on carrier paper. Modular Index aggregates registry-wide metrics live (avg KeyScore, IG share, climate-resilient share, avg price per capacity). Tenant isolation is row-level with per-partner API keys and capability-scoped access. Deployment: managed SaaS with per-region data residency at Enterprise tier. See the full architecture brief, the published record schema, and the licensed-partner posture for every regulated function.
Five engines. One asset record.
Whatever the module — a wall panel, a full volumetric unit, a panelized floor system — Keystone ingests it once. Everything downstream runs off the same verified record.
Module Registry
Module passport
Carfax-grade provenance + QA + resilience record per module. KeyScore 0–99. Auto-hashed at insert. The source of truth for the other four engines.
Capital Rail
Underwriting + indicative pool-grade API
Pool eligible modules, get weighted KeyScore + AAA → NR indicative grade + senior/mezz/equity tranche pre-screen (70/20/10). NRSRO partners issue the official rating.
Disbursement Rail
Verified-release government API
HUD / HFA / state programs gate release on verified milestones. Funds flow through existing payment rails. Remaining-budget enforced. SaaS usage fee in basis points. Audit immutable.
Insurance Rail
Resilience-priced MGA
Premium computed from seismic + KeyScore + net-zero. Strong modules quote sub-90bps. MGA book stats live.
Modular Index
Industry-grade modular index
Avg $/sqft, avg KeyScore, IG %, net-zero %, resilience mix — live from the registry. Std/Pro/Ent licensing tiers.
Are you a…
Every industrial supply chain has the same cast. Keystone sits underneath as data infrastructure.
Are you working on…
The verified-asset rail architecture generalizes. Housing is where it shipped first.
Five engines. Five pricing models.
Keystone overlays your existing rails and charges per verified event — never a flat SaaS seat. Registry: per-event usage fee. Capital Rail: per-pool subscription plus partner revenue-share. Disbursement Rail: basis-points usage fee, visible on every release record. Insurance Rail: per-policy licensing or shared MGA commission. Modular Index: Standard / Pro / Enterprise annual licensing.
Data infrastructure — never regulated activity.
Every regulated function stays with a licensed partner: NRSROs issue credit ratings, MGAs bind insurance on carrier paper, SEC-registered broker-dealers place securities, existing federal/state/Treasury rails move funds. Callisto Bridge holds the verified record.
Keystone — the five questions buyers open with.
What is Keystone?
Keystone is the verified-asset rail for industrialized construction. Every module built on the factory line gets a signed, hashed, KeyScore-scored record. Five downstream engines — registry, capital, disbursement, insurance, and index — read the same record. Built by Callisto Bridge. Patent pending.
Is Keystone a credit rating agency, MGA, broker-dealer, or money transmitter?
None of the above. Keystone is data infrastructure. NRSRO partners (KBRA, DBRS, Fitch, S&P, Moody's) issue the official credit rating. Licensed MGA partners bind insurance on carrier paper. SEC-registered broker-dealers place any securities. Existing federal, state, and Treasury rails move funds. Keystone provides the verified record every regulated function reads. See the partner model.
What data does Keystone need to ingest a module?
At minimum: asset identifiers, QA records, inspection events, and lifecycle state. Most of this already exists in your MES, ERP, or inspection system. Three ingest paths: CSV bulk import (for backfilling existing modules), the ingest API (for live factory data flowing continuously), and a CPS-node spec on the roadmap for on-line integration.
How is Keystone priced?
Five engines, five pricing models. Registry: per-event usage fee auto-metered at every insert and state change. Capital Rail: per-pool subscription plus partner revenue-share — never gain-on-sale on placed securities. Disbursement Rail: basis-points usage fee per verified release, visible on every record; funds always flow through partner Treasury rails. Insurance Rail: per-policy licensing or shared MGA commission. Modular Index: Standard, Pro, and Enterprise annual licensing tiers. Specific fee levels are set during the engagement conversation. See the pricing framework.
Who is Keystone for?
Manufacturers who already produce the data. Lenders, insurers, HFAs, and capital partners who can't price what they can't verify. Solutions splits it two ways — by role or by sector.
Category-defining reading.
What is a verified-asset rail?
Five-component definition. How it differs from an ERP, MES, or asset-management system.
How the KeyScore works.
The 0-99 score that drives pool ratings, disbursement eligibility, insurance pricing, and the Modular Index.
Industrialized construction has no real benchmark.
CoStar built a $25B business by becoming the source of truth for CRE. Modular has no equivalent — yet.
Need AI in your product, not just verified-asset infrastructure?
Applied AI is Callisto Bridge's R&D-grade AI capability partnership. Same commercial pattern as Keystone — we build the R&D-grade layer; you sell the outcome to your customers.
Bring 25 to 100 anonymized asset records. See the outputs on your data.
The six-week fixed-scope design-partner pilot ingests a set of your real records and produces the actual registry, KeyScore, and downstream engine outputs. Written outcome brief. Preferred production economics on rollout.