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Rank #5 of 5 in Payment Fraud Prevention

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Sift

YC S11Enterprise

Sift Science, Inc. · commercial

pypi 49.9k/wk

Try itExperimental

See what an agent can do with Sift before you ever sign up. Pick a story: recorded sessions replay real probe-harness transcripts; commands tagged live-capable can re-run against the real endpoint from our edge, right now (▶ run live — the exact same request, live and recorded lines always labeled); sandboxed self-drive sessions are designed and gated (docs/TRY-IT.md).

$curl -s -X POST https://api.sift.com/v205/events -H 'Content-Type: application/json' -d '{}' # keyless → status 51 "Invalid API Key"recorded session — replayed, not live
recorded 2026-09-14 · exit 0 · captured verbatim by our probe harness, secrets redacted · pure-HTTP probe — ▶ run live re-runs it from our edge

Verified integrations

No integration evidence found in our corpus for this product yet — that means none was found, never that it doesn’t integrate.

By theme — the product's score on each story themeBy theme

Agentic commerce — stories about agentic commerce in this arenaAgentic commerceevidence →

Stories about agentic commerce in this arena

0.0/100

Agenticness — how well agents can access and operate the productAgenticnessevidence →

How well agents can access and operate the product

6.4/100

Automation depth — how much of the product can run unattendedAutomation depthevidence →

How much of the product can run unattended

16.2/100

Chargeback disputes — stories about chargeback disputes in this arenaChargeback disputesevidence →

Stories about chargeback disputes in this arena

0.0/100

Fraud agent access — stories about fraud agent access in this arenaFraud agent accessevidence →

Stories about fraud agent access in this arena

0.0/100

Fraud surfaces — stories about fraud surfaces in this arenaFraud surfacesevidence →

Stories about fraud surfaces in this arena

35.7/100

Model transparency — stories about model transparency in this arenaModel transparencyevidence →

Stories about model transparency in this arena

0.0/100

Openness — open source, data portability, and self-hosting storiesOpennessevidence →

Open source, data portability, and self-hosting stories

14.4/100

Privacy posture — data-handling and privacy storiesPrivacy postureevidence →

Data-handling and privacy stories

0.0/100

Residency compliance — stories about residency compliance in this arenaResidency complianceevidence →

Stories about residency compliance in this arena

0.0/100

Review queues — stories about review queues in this arenaReview queuesevidence →

Stories about review queues in this arena

31.7/100

Risk scoring — stories about risk scoring in this arenaRisk scoringevidence →

Stories about risk scoring in this arena

39.1/100

Rules engine — stories about rules engine in this arenaRules engineevidence →

Stories about rules engine in this arena

9.0/100

Story verdicts — every judged story with its evidenceStory verdicts

?

Sorted by importance (agentic first) (high → low) · 54/54 stories · click a row’s chevron for the rationale and evidence

Drive the product through a documented public API G

Agent access

ai-native userAgenticness — how well agents can access and operate the productAgenticness3partial6/10X

Connect an agent via an official MCP server G

Agent access

ai-native userAgenticness — how well agents can access and operate the productAgenticness3none0/10

Delegate tasks to a built-in AI assistant inside the product G

Agentic features

ai-native userAgenticness — how well agents can access and operate the productAgenticness3noneuntestednone yet

Plug MCP servers into this product so it can use their tools G

Agent access

ai-native userAgenticness — how well agents can access and operate the productAgenticness3n/auntestednone yet

Run the product headlessly / in CI for automation G

Agent access

ai-native userAgenticness — how well agents can access and operate the productAgenticness2partial4/10C

Set up automations that run autonomously in the background G

Agentic features

ai-native userAgenticness — how well agents can access and operate the productAgenticness2partial4/10C

Download a machine-readable API spec (OpenAPI or equivalent) G

Api quality

ai-native userAgenticness — how well agents can access and operate the productAgenticness2none0/10

Get AI-generated insights and suggestions from my data inside the product G

Agentic features

ai-native userAgenticness — how well agents can access and operate the productAgenticness2none0/10

Build against official SDKs G

Agent access

ai-native userAgenticness — how well agents can access and operate the productAgenticness2noneuntestednone yet

Explore an interactive API reference with runnable examples G

Api quality

ai-native userAgenticness — how well agents can access and operate the productAgenticness2noneuntestednone yet

Issue scoped/least-privilege API credentials for an agent G

Agent access

ai-native userAgenticness — how well agents can access and operate the productAgenticness2n/auntestednone yet

Operate the product with natural-language commands G

Agentic features

ai-native userAgenticness — how well agents can access and operate the productAgenticness2noneuntestednone yet

Point an agent at llms.txt or agent-oriented docs G

Agent access

ai-native userAgenticness — how well agents can access and operate the productAgenticness2noneuntestednone yet

Rely on versioned APIs with a documented deprecation policy G

Api quality

ai-native userAgenticness — how well agents can access and operate the productAgenticness2noneuntestednone yet

Subscribe to events via webhooks G

Agent access

ai-native userAgenticness — how well agents can access and operate the productAgenticness2noneuntestednone yet

Use an official CLI G

Agent access

ai-native userAgenticness — how well agents can access and operate the productAgenticness2noneuntestednone yet

Test against a sandbox environment without touching production data G

Api quality

ai-native userAgenticness — how well agents can access and operate the productAgenticness1noneuntestednone yet

Get a machine-learning risk score for a transaction in real time — synchronously, before authorization completes — through a documented API C

Scoring api

developerRisk scoring — stories about risk scoring in this arenaRisk scoring3partial6/10X

Author custom rules that combine model scores, velocity counters, list matches, and transaction attributes into allow, block, or review decisions C

Rule authoring

risk analystRules engine — stories about rules engine in this arenaRules engine3disputed5/10D

Define rules that trigger actions automatically on events G

ai-native userAutomation depth — how much of the product can run unattendedAutomation depth3disputed5/10D

Flagged transactions land in a review queue that shows the full context — customer history, signals, similar cases — so I can decide quickly and consistently C

Case review

risk analystReview queues — stories about review queues in this arenaReview queues3partial5/10X

Use the product across whatever payment stack I run — multiple PSPs, gateways, and platforms — rather than being locked to one processor's rails C

Psp coverage

developerFraud surfaces — stories about fraud surfaces in this arenaFraud surfaces3partial5/10C

An agent can read my fraud posture and manage rules and lists programmatically — propose a velocity rule, update a blocklist — with human approval gates C

Agent operations

ai-native userFraud agent access — stories about fraud agent access in this arenaFraud agent access3none0/10

Every score comes with its top risk factors — why this transaction looks risky — not just an opaque number C

Explainability

risk analystModel transparency — stories about model transparency in this arenaModel transparency3none0/10

Chargeback responses are automated — evidence compiled from order, delivery, and session data and submitted to the issuer without manual copy-paste C

Representment

ops userChargeback disputes — stories about chargeback disputes in this arenaChargeback disputes3noneuntestednone yet

Export all of my data in open formats and leave G

ai-native userOpenness — open source, data portability, and self-hosting storiesOpenness3noneuntestednone yet

Prevent my data from being used to train AI models G

ai-native userPrivacy posture — data-handling and privacy storiesPrivacy posture3noneuntestednone yet

Self-host the core product G

ai-native userOpenness — open source, data portability, and self-hosting storiesOpenness3n/auntestednone yet

Feed the model my own signals — device fingerprints, behavioral data, custom metadata — so scoring reflects my business, not just network defaults C

Custom signals

developerRisk scoring — stories about risk scoring in this arenaRisk scoring2full8/10C

Protection extends beyond checkout — account takeover, fake account creation, promo and policy abuse are scored and managed in the same system C

Abuse coverage

risk analystFraud surfaces — stories about fraud surfaces in this arenaFraud surfaces2full8/10C

Map score ranges to actions — allow, review, block, step-up 3DS — and tune thresholds to my own risk appetite instead of a fixed cutoff C

Score actions

ops userRisk scoring — stories about risk scoring in this arenaRisk scoring2partial7/10X

Do everything through the API that I can do in the UI G

ai-native userOpenness — open source, data portability, and self-hosting storiesOpenness2partial6/10C

My review decisions and confirmed fraud outcomes feed back into the model and rules, so the system learns from every case we work C

Feedback loop

risk analystReview queues — stories about review queues in this arenaReview queues2partial6/10X

Review work is a team workflow — assignment, escalation, SLAs, and a decision audit trail that shows who approved what and why C

Team workflows

ops userReview queues — stories about review queues in this arenaReview queues2partial5/10X

Maintain allow and block lists — emails, cards, devices, IPs — and velocity limits, managed through the dashboard and programmatically C

Lists

ops userRules engine — stories about rules engine in this arenaRules engine2disputed3/10D

Perform bulk operations across many items at once G

ai-native userAutomation depth — how much of the product can run unattendedAutomation depth2partial3/10C

An agent can work the review queue — pull flagged cases with their context, summarize the evidence, and recommend a decision for a human to confirm C

Agent triage

ai-native userFraud agent access — stories about fraud agent access in this arenaFraud agent access2none0/10

Backtest a rule against my historical traffic before deploying it, seeing exactly what it would have blocked, flagged, and cost C

Backtesting

risk analystRules engine — stories about rules engine in this arenaRules engine2none0/10

Choose where my data is stored (region/residency) G

ai-native userPrivacy posture — data-handling and privacy storiesPrivacy posture2none0/10

Control data retention and deletion G

ai-native userPrivacy posture — data-handling and privacy storiesPrivacy posture2none0/10

Control where fraud data lives and how long it's kept — regional residency options and retention controls that survive a privacy review C

Residency

ops userResidency compliance — stories about residency compliance in this arenaResidency compliance2none0/10

The product ships its own AI assistant — natural-language queries over my fraud data, drafted rules, investigation summaries — built into the console C

Builtin ai

risk analystFraud agent access — stories about fraud agent access in this arenaFraud agent access2none0/10

There are maintained integrations for my commerce stack — Shopify, Salesforce Commerce, BigCommerce, and the major PSPs — not just a raw API C

Integrations

ops userFraud surfaces — stories about fraud surfaces in this arenaFraud surfaces2none0/10

European traffic is routed intelligently through SCA — 3DS triggered when required or risky, exemptions requested when safe — to protect both compliance and conversion C

Sca

developerResidency compliance — stories about residency compliance in this arenaResidency compliance2noneuntestednone yet

Measure the model itself — precision and recall on my traffic, shadow-mode trials of new models or rules before they take over decisions C

Model evaluation

finance leadModel transparency — stories about model transparency in this arenaModel transparency2noneuntestednone yet

Opt out of telemetry and usage tracking G

ai-native userPrivacy posture — data-handling and privacy storiesPrivacy posture2n/auntestednone yet

Pass verified agent identity — agentic-payment protocols, signed agent tokens, delegated spending scopes — into the risk decision as a first-class signal C

Agent identity

developerAgentic commerce — stories about agentic commerce in this arenaAgentic commerce2noneuntestednone yet

Read the product's source under an open license G

ai-native userOpenness — open source, data portability, and self-hosting storiesOpenness2n/auntestednone yet

Schedule recurring jobs or workflows G

ai-native userAutomation depth — how much of the product can run unattendedAutomation depth2n/auntestednone yet

Scoring benefits from a cross-merchant network — a card or identity seen across thousands of other businesses informs the risk decision on mine C

Network effects

founderRisk scoring — stories about risk scoring in this arenaRisk scoring2noneuntestednone yet

See the numbers that matter — dispute rate, false-positive rate, approval-rate lift, review workload — and export them for the board C

Outcome reporting

finance leadChargeback disputes — stories about chargeback disputes in this arenaChargeback disputes2noneuntestednone yet

Shift fraud liability to the vendor — a chargeback guarantee that reimburses approved-then-disputed orders, with clear coverage terms C

Guarantee

finance leadChargeback disputes — stories about chargeback disputes in this arenaChargeback disputes2noneuntestednone yet

The product distinguishes malicious bots from legitimate AI buying agents, so agent-driven purchases aren't blanket-blocked as fraud C

Agent detection

ai-native userAgentic commerce — stories about agentic commerce in this arenaAgentic commerce2noneuntestednone yet

Version, review, and roll back my automations G

ai-native userAutomation depth — how much of the product can run unattendedAutomation depth1n/auntestednone yet

Opportunities — the stories that would move this product's scores, from its own judged verdictsOpportunitiestop 8 of 42 stories with headroom

What would move Sift’s scores — derived from its own judged verdicts, biggest headroom first. Each line quotes what the judge found missing; shipping it (or evidencing it publicly) is the fix.

  1. Agenticness — how well agents can access and operate the productDelegate tasks to a built-in AI assistant inside the product

    nonemoves Built-in AIimpact 45

    The axis applies to this product kind (peer products hold positive or none verdicts on this story), so lack of evidence for an applicable capability is "none", never "na".

  2. Agenticness — how well agents can access and operate the productConnect an agent via an official MCP server

    nonemoves agent-readyimpact 45

    Missing: any mention of MCP, agent integration protocol, or official MCP server endpoint.

  3. Fraud agent access — stories about fraud agent access in this arenaAn agent can read my fraud posture and manage rules and lists programmatically — propose a velocity rule, update a blocklist — with human approval gates

    nonemoves PA Scoreimpact 30

    Missing: any mention of AI agent integration, agentic rule-proposal workflow, or human-approval gate mechanism tied to programmatic rule/list changes.

  4. Chargeback disputes — stories about chargeback disputes in this arenaChargeback responses are automated — evidence compiled from order, delivery, and session data and submitted to the issuer without manual copy-paste

    nonemoves PA Scoreimpact 30

    The axis applies to this product kind (peer products hold positive or none verdicts on this story), so lack of evidence for an applicable capability is "none", never "na".

  5. Openness — open source, data portability, and self-hosting storiesExport all of my data in open formats and leave

    nonemoves PA Scoreimpact 30

    Missing: any documented data export/download capability, open-format export (CSV/JSON dumps), or account data portability tooling.

  6. Privacy posture — data-handling and privacy storiesPrevent my data from being used to train AI models

    nonemoves PA Scoreimpact 30

    Missing: any documentation of an opt-out mechanism, training-data exclusion policy, or user-facing privacy control preventing model training use.

  7. Model transparency — stories about model transparency in this arenaEvery score comes with its top risk factors — why this transaction looks risky — not just an opaque number

    nonemoves PA Scoreimpact 30

    Missing: any documentation of explainability/reason-code output, feature-importance breakdowns, or examples of a score being paired with human-readable risk drivers.

  8. Agenticness — how well agents can access and operate the productPoint an agent at llms.txt or agent-oriented docs

    nonemoves agent-readyimpact 30

    Missing: llms.txt file, agent-readable docs format, any mention of AI-agent-targeted documentation.

Showing the top 8 of 42 — every none/partial verdict in the story verdicts table is headroom.

Think a verdict is wrong? Every verdicts-table row has a Flag link — see the methodology.

Coverage map — which docs area, API section, or community source covers which judged storiesCoverage map4 surfaces · 16 covered stories

Where the cited evidence behind each covered verdict came from — the same citations the verdicts table shows, no extra judging.

docs16 stories

Tutorials docs15 stories

Probe proofs — replayable recordings from the probe harnessProbe proofs

Replayable recordings from our probe harness — see the Prove-It protocol to submit one.

$curl -s -X POST https://api.sift.com/v205/events -H 'Content-Type: application/json' -d '{}' # keyless → status 51 "Invalid API Key"reproduced
$ curl -s -X POST https://api.sift.com/v205/events -H 'Content-Type: application/json' -d '{}'  # [redacted]less → status 51 "Invalid API [redacted]"
{"status":51,"error_message":"Invalid API [redacted]. Please check your credentials and try again.","time":1789428793,"request":"{}"}
$curl -sL https://sift.com/llms.txt | head -3reproduced
$ curl -sL https://sift.com/llms.txt | head -3
# Sift

**Fraud Prevention Platform for Digital Business**

Claims vs evidence — vendor claims reconciled against independent verdictsClaims vs evidence

5 of 10 testable claims verified · 3 contradictedintegrity 0/100

14 distinct capability claims found in Sift’s own claimed-docs/GitHub materials, reconciled against our judge’s independent verdicts.

5

Verified

2

Unverified

3

Contradicted

6

Undersold

Verified (6)
Unverified (4)
Contradicted (3)
Undersold (6)
Claims outside our story set (2)

Real capability claims found in Sift’s own materials, but no story in this arena’s taxonomy covers them yet — that’s feedback on the taxonomy, not a mark against the product.

  • Backfill months of historical data to jump-start and improve model accuracy

    source ↗
  • Provides a session_id field to track anonymous users across the JS snippet and Events API

    source ↗
Suggest a story for these →

Business model

enterprise-custom

Quote-only enterprise pricing sold on event volume — no public pricing page, sales contact only; a score-only model: Sift offers no chargeback liability-shift guarantee.

pricing ↗

Score trend

How this product’s scores have moved as evidence and verdicts are re-derived — a point per change, not per day.

PA Score10 (Sep 14 '26)9 (Sep 14 '26)
Agent-ready10 (Sep 14 '26)10 (Sep 14 '26)

Try Experimental

Run it in the microterminal →

Recorded agent sessions — and a live MCP handshake where the vendor ships one.

Flag

⚑ Flag a verdict

Think a verdict is wrong? Opens a prefilled GitHub issue — or use the ⚑ next to any verdict above.

Badge

Embed this product's score badge →

Hotlinked SVG — always shows the live current score.

For agents

Data